Engine fan stays on when ac is on

You the should be able to raise or lower temperature and set fan speed without AC coming on. Jul 04, 2011 · I have a 06 freightliner with a detroit series 60. Note the AC only starts fan at 160 psi , that usually means it's above 75* F outside temp for the AC to hit that pressure. Cooling Fan problem of the 2013 Chevrolet Cruze 1. Help please! Even when I first start the car in the morning the fan comes on immediately. 1. Throws a P0128 code when its being a pain and i keep resetting it. 2015 567 pete 550 isx. Sep 12, 2009 · The fan speed changes a little crazy too much and it actually seems more dependent on not speed necessarily, but engine power; the fan speed decreases significantly when revving up and once I take my foot off the pedal, it resumes proper speed. When the AC is off, the fan should be controlled by a temp sensor. Auto ON and OFF, without AC, but as soon as AC is turned on and off, fan keeps working) Perfectly normal, it just means your coolant temp is still higher than set point so your fan will stay running even with engine off till the temperature reaches set point of about 190f 90 c AC Fan Runs Constantly Even if Unit is Turned Off! More than likely you have a A/C fan relay that is stuck OR the contacts are burnt together. This heat would otherwise destroy the engine if allowed to remain. A car's electric cooling fans are responsible for ensuring air flow over the radiator at low speed, and failure will almost always cause overheating while in traffic. If the fan does not operate, replace the motor. In other words, you must replace the fan if you have a faulty final stage unit. Jun 27, 2011 · If both fans are running all the time, your high pressure switch on the A/C is bad. Jun 23, 2010 · You could have a bad high press switch on the A/C. as for the a/c coming on with the defroster, every vehicle that has functioning a/c will do this. Open hood, disconnect and isolate the battery negative cable. Confirm that there are no leaks at the sensor, that the air-conditioning is operating as expected and that the fan no longer runs at a constant high speed. Fan Selection: Depending on vehicle design, the fans may operate singly or in tandem. Before I go and drop the $$ for a new control module can anyone tell me how to test the module or make the fans run on high. located on top front of engine near #1 injector. The fan turns off only when the ignition is turn ON. The temp gauge is working fine. When the temperature dips below that preset temperature, the fan will turn off. engine temp is above 215F +/- 2. Remove the left side headlamp bulb from the headlamp housing. While running a head gasket sealant, I noticed that my radiator fan This fan will only come on when the AC is on, and I'm at my wit's end. May be one of the experts on engine- wengine stuff will know about that. It is switch B that turns on the fan after the engine is shut off, as long as the engine temp is above 223. Aug 27, 2005 · the normal running engine temperature on the passat is 195 degrees , most of the time the primary cooling fan gives out and they run somewhat warmer than that. Hi, I have Mitsubishi gallant v6 2004. Also stays on when driving down the highway. However, over time, several things can go wrong with it. Aug 31, 2010 · When the air coming through the radiator is below a given temperature (normal engine operating temp, or below), the clutch allows the fan to free-wheel. On a C, to set temperature without turning on AC, hit the fan speed button. On a 4 cylinder engine, the idle is usually not that great anyways but if yours seems worse than the norm, might want to get that straightened out because the A/C puts a pretty good strain on the engine and if it struggles as it is, the added challenge of A/C is gonna bog the hell out of it. Mechanic found a short in main wiring and re placed section of cable where shielding had cracked. Defective battery. Oct 16, 2010 · AFAIK, some BMW cars have 2 sets of fan. I’ve read that the cooling fan will run the whole time when either the A/C is on or the vent control is set to defrost, regardless of whether the engine is cold or hot. I've checked the fuse in the dash fuse panel and it is good. Also, not sure if the Traverse shows it or not, but I've noticed on several vehicles that have electric fans, that have a sticker under the hood, near the fan shroud that state not to place fingers near the fan, as it can turn on at any time. Also the fan was running 5 min after I shut vehicle off I had to pull relays to shut it off. I'm the ONLY one that has their electric engine fans come on or stay on after turning off the engine The AC is connected to the ac compressor. The fan runs continuously (longer than 1 hr) after removing the key on a cold engine. How It Works. It's an 2013 F150 Screw Lariat Ecoboost. Thats the swtich that will turn the fan on when the A/C is on and say your not moving to get air flow. The noise heard is louder than normal for a cold engine. e. The fan is only working in this condition deriving power from the battery. 2008 Chevrolet Uplander Radiator fan running constantly. May 16, 2013 · Re: Electric Cooling fans staying ON when Engine is OFF. 3rd trip. Pusrant to my other thread I think i have determined my rad. As soon as I start my truck the fan starts in high Q: Coolant fans not running when ac is turned on. Dealer can't look at it until the morning. Sep 01, 2018 · The fan or blower in the car's AC system is simply blowing air and there is no cooling effect. The Bentley repair manual will cover the fan replacement for a given BMW or MINI model. Focus Cooling Fan stays on Constantly. This unit spins when the engine is running, and it always spins at the same rate as the engine. With the fan on, the pressure will rapidly drop down the 150-200 psi range depending on how hot it is outside. 2015 567…. When the temperature reaches about 223-degrees F (value depends on make/model/engine), the PCM will command the cooling fan relay to turn on the fan. you can use a scan tool to figure out if it has a code, and a tech 2 to command the fan on, then if it doesnt work, then you take a test light to the connector for the fan, and if it lights between power and ground, you need a new fan. Thus, the fan stays on in case it's over-heating, even though it's not. Fortunately, these systems are fairly easy to diagnose in the event of failure. Any ideas on what could be the problem? Aug 13, 2012 · THE PCM commands the low speed cooling fans on when engine coolant exceeds 220 degrees. This video is on a Pontiac Solstice but the principals are the same for most cars. My car has 234565 miles. The nav screen goes down, gauges turn off, etc, but the motor is still on. 4l model. Dec 05, 2013 · This is a very common problem with the Mercedes radiator cooling fan running constantly on high speed. Onto my point. Cooling fans stay on at all times. When the temperature in the engine reaches a certain preset temperature, the fan will begin cooling the engine. 2 km. Mar 27, 2015 · Honda Accord: Why Does My Fan Keep Running After the Car is Turned Off? In some cases, the cooling fan under your hood stays on for a prolonged period of time, causing your battery to die. Some tiny 1L cars with AC needs to turn the AC off to get up the hill. Here is a picture of the cooling fans that stay on, when you turn off the car. The fan has operates in two stages depending on the engine coolant temperature. Nov 21, 2016 · It stays on cold because the twin fans run the entire time the car is on, and keep running for 15 minutes after the car is shut off. They can go bad and make the fan stay on even with the A/C off. Volvo Blower Fan Runs when car is shut off. group 135, engine was cold 30C, and i had a load of 83% group 137 with AC set on HI Load went all the way to 98% with an absolute pressure of 27. Other Types of Fans. The "ac off to high engine temperature" light illuminated. If I unplug high pressure switch,fan goes off but - Answered by a verified Technician We use cookies to give you the best possible experience on our website. As for the engine coolant temp sensor, if the coolant is not hot enough to make the fan come on, then there is no need for the fan yet and there is no problem. Question - Cooling fan running all the time. The cooling fans on Chrysler cars are not particularly well-made, but that doesn't mean you can assume that they are broken the second the cooling system stops working. The ac may not run the fan on cooler days. Jun 11, 2010 · Posted June 11, 2010. Jul 22, 2017 · Generally, even on a hot day, the pressure will increase rather rapidly, but the fan won't kick in until the pressure is about 300-350 psi. Jan 27, 2012 · I have a 2003 mini cooper radiator fan comes on "after" the engine is offIt is loud and stays on for about 5 minutes It is supposed to. Apr 29, 2015 · i have since grounded the switch and the fan unlocks. I have a 2001 Scenic Mk1 and the cooling fan stays on. They stay on same speed without AC even if the needle is going above the middle. Jul 18, 2013 · The fan is mounted between the radiator and the engine and is the main engine cooling fan. As of the "little pipe" you speak of -- I dont know what your talking about. The engine has no power at idle, it would be same as if you switch in gear and slowly release a clutch. A volvo cooling fan is driven by the engine, helping to cool the engine. Help! Fan quit working on all 4 speeds. On all BMW models up through the late ’90s, the auxiliary (or main) fan is controlled by one or two thermostatic switches that are mounted into the radiator side or bottom tanks. So it stays on till the desired cooling down has occured. Mar 31, 2007 · Volvo Cooling Fan Runs Continuously Airflow speed through a radiator is a major influence on the heat it loses. The Fan Clutch allows the fan to operate at lower speeds and effectively detach at higher speeds when the vehicle is moving and air movement due to velocity aids to cool the engine. The engine may overheat if the radiator fan stops working, an event that can cause There are two coolant temp switches on the engine, one that turns on at 200 deg F (switch A) and one that turns on at 223 deg (switch B). So the fan runs mostly at idle or low speed when the engine is at normal temperature. 6bar and i could see in field 2 the compressor switching on then off the fan did not come on at all, i logged the groups for a few minutes and again the engine was cold Jan 11, 2012 · Good idea on T stat. Over time the power steering fan will rust up and the one day when your car needs the fast cooling fans it will turn on the rusty one and the fuse will pop, its just a 5amp running the control system, do NOT put a larger fuse in! the fans continue to run after the motor is turned off and drains the battery dry. Jan 26, 2009 · scan tool is only going to tell you so much, diagnosing why the fan isnt working is what we are trying to figure out. 5 liter. Its a 1996 VW vento. However, they should not be running 100% all the time. It turns off as soon as we completely let out foot off the throttle. Your ECU box is located on the right hand side of the engine bay. The operating fan helps out by blowing fresh air past the engine. When you are going down the road, the wind helps cool the compressor, but if idling, the compressor fan does the job. Oct 17, 2006 · My engine fan has started running all of the time. it helps to dry out the interior speeding up the process of getting the fog off the glass. Also, if I turn the key to the on position without starting the engine the fan also starts and stays on throughout the journey until I literally switch off the ignition. Jul 28, 2012 · Thread starter #1. I live in Minnesota and when I started the truck 2 days ago (25 degrees), my coolant fan turned on high right after startup. This info relates to the electronically controlled blowers, which are part of the Automatic Temperature Control (ATC) units in some Chrysler vehicles, usually in later models and higher end cars. yes this is a normal process. And as you noted, there is a tie-in with the AC system that should at least bring the fans to low speed even if the water temp is low. This may take awhile, but will post my results. This occurring during the day when it is real hot. 6 Zetec, 2001 Auto) starts up within about 5 seconds of switching the engine on - I have noticed this even on the coldest days. The part number is 6x0-959-445-f. The first thought that usually come to mind is whether the fan has failed. In cold temperatures, the automatic HVAC system will provide heat in the most efficient manner. I am looking for pics to locate and replace the fan control. Aug 27, 2007 · 98 SLS After using my A/C, I shut off the car and the fan keeps blowing. You may try to ask the Dealer for the proper operation of this fan. Under normal conditions the fast speed will never happen as the low speed will cool the car enough. Once the pressure drops, the pressure switch resets. If it's been doing this in colder weather or for longer than 10 minutes or so, I'd have it looked at. Another way to rule out a clutch that has mechanically failed is to bring the engine RPM over 1900. The mechanical fan probably takes 7-8 hp to operate, so we're going to cool the engine and lower the e. 2. Truck is at shop again. The customer’s complaint is that there is a loud rattling noise when the engine is first started. The cooling fan will come on when the engine is cold and it will stay on the entire time the engine is running. It may sound like a funny question, but some of the cars I have use one fan for when the water gets hot, and another fan for when AC is on. Then will come back on after a few minutes. May 14, 2017 · This video guides you through diagnosing a cooling fan that is always running. It does so by supplying the ground to the relay. @fusebox. My cooling fans does come on and with AC on they do increases speed but not to the max speed even when the engine is overheating. Another type of fan is the engine driven fan. Blown fuse. My 2007 S did that in the summer a lot. In order for the AC Condensor to do its job it must stay as cool as it can. The fans will stay at high speed until the pressure drops below around 250 psi, at which point they will return to low speed. If the fan does not operate check the Measuring Value Block(MVB) Group 135, field 2 will show you in (%) the current fan output speed from the ECM. Yes, the engine still puts out heat even when it is off. Radiator fan stays on after car is off 7 Answers. The fan clutch is just what the name says, it is a mechanism that will clutch the fan on and off depending on the need for more or less cooling air to flow thru the radiator. Sep 01, 2018 · The AC does not turn On if you simply switch on your car or put it in ignition. Starter Will Not Work Loose or corroded battery connections. 2009 - 2014 Ford F150 - Cooling Fan Stuck ON HIGH! - Hi everyone! I just joined today because I bought my first Truck. Do I need to change the resistor or change the whole ac/heat control unit with the 3 knobs? On a 2010 Ford Mustang : In the Power Distribution Box ( which is " live " ) located in the front of the engine compartment , on the passenger side Relay # 50 , full ISO relay , cooling fan relay The blower motor will operate when the key is in run regardless of whether the motor is running. Jun 23, 2013 · Yes the the a/c is on. These fans are designed to only cycle on and off when needed, and running continuously will shorten its lifespan. Electric engine cooling fans are used to help remove the excess heat produced by the engine during the combustion process. If it isn't working, you will get hot air when sitting still. I have a 1998 peterbilt 379 3406e cat. Fan keeps running after engine is stopped. Jan 12, 2018 The condenser fan and radiator fan help the air conditioning and engine ways, based on coolant temperature or air conditioner activation. Usually because you've gotten the temps high enough that it'll trigger the fan, if it sounds like a jet engine, it's the high speed relay. It keeps coolant circulating for a few minutes to cool the engine. With AC on fan working. The fans will kick on with the AC and or when the car reaches a particular coolant temp. Refer to Lighting and Horns. Truck runs fine but no ac. Watch this video to figure out how to diagnose problems with the cooling fan relay on a Chrysler. yes, the roadside rewires did some magic on the thermostat and the car starts with the fan running (with or without ac)n yes, the fan runs all through for 2 hours or even more (after the engine has been shut down and has cooled off completely). Battery Discharge Indicator Stays On With Engine Running Low engine speed. Engine fault light on, fan running for about 10 mins after car turned off. If it's not the relay, your  Nov 9, 2015 It's normal for some vehicles to have a fan run for a few minutes after the car is shut off, generally to keep the engine cool. 2008 Chevrolet Uplander Cooling Fan. . Even after the water temp dropped below 185, the fan stayed on. Hi, I’m Wayne. 1 which is either electric engine driven which is used to cool the radiaotr. Does not matter if the engine is hot or cold. Freightliners use a simple dial on the HVAC control unit to control the setting of the AC system. when it's on, the fan is on. The cooling fan on my wife's 1. @luke - In palio, the radiator fan works for a few seconds ( if not, minutes ) if the engine is hot, after you turn the engine off. When I turn it off, the engine shuts down but there is a noise, hard to describe, like something's still running. The plug is directly below the power steering pump. I was wondering that but usually you don't have any heat in the vehicle when T stat is stuck open. (Approx. 2) The engine fan is turning on at 180-190 degrees and is staying on for several minutes even after the temp is at a normal or even below. Dec 29, 2013 · To replace the module, The radiator fan relay is located below the left front headlamp module. The primary purpose of this fan is to blow the air that has been cooled inside of the exchanger all throughout your home via a series of ducts. Jan 22, 2016 · I have the same issue on my 2016 Ram 1500 with 1400 miles. (Please note that Fan works well i. The first problem is that no matter what setting I have the fan set to (off or 1-5) it will randomly turn onto full blast for a few seconds and then turn back to wherever it was originally set. Cooling Fan Will Come On And Stay On Now And Then After Ignition Has Been Turned Off. I've figured out my problem but lets see if anyone else comes to the same  Sep 20, 2017 The engine fan only runs constantly when the motor is running but not The ac system on this truck was taken out by the previous owner I  Feb 21, 2016 Friday afternoon I went to the store and after I locked the doors and walked away I heard the engine fan still on. System has freon in it. Feb 18, 2011 · If it is very quiet and you enter car close doors and listen you can hear the fan usually. The vehicle was taken to an independent mechanic where the thermostat and the cooling sensor were replaced. It shuts off after 10 seconds (yes, I timed it! and you can laugh). It was working find but now nothin7. Usually comes on when the car is standing still due to the small amount of air circulating through the radiator. IF A/C is cooling ok and engine isn't overheating A/C isn't cooling ok till you start driving. its usually located on the edge of the radiator on the passenger side ive done escorts and thats where its found testing it is pretty pointless as this is what switches the fan on and off at a predetermined temperature when it goes the fan either stays on or doesnt comne on at all it will mean draining some coolant out though one thing though if you have aircon or climate control the fan will run all the time if you do have it switch it off and check Dec 29, 2012 · The ecu is what sinks the ground to terminal b at fan solinoid , the a/c high pressure switch is normaly closed and is forced open when you have high a/c pressure in system , when it is forced open the 12 volt signal to eecu is disconnected , when ecu sees this its keeps the eecu from sinking the ground to the terminal b at fan solinoid and engages the fan fuse 41 supplies 12 volts to the high pressure switch coolant temp switch = when ecu see high temp turns fan on this is a ohms reading to Jun 23, 2013 · Yes the the a/c is on. Jul 25, 2010 · If the engine's warm when you start it, then the fan might kick in immediately - this is because the coolant heat will be concentrated at the top of the engine - due to lack of pump circulation - which is where the coolant temperature sensor's located. Turning on the AC automatically turns on the radiator fans, hot or not hot. I have tested the 2 fan relays (low and high spped) and also the injector lock relay and they all work OK. I would differ with Phil in that the fans go to high speed not because the pressure is too high, but there is such a large heat load on the ac system, like when you start up the ac on a 90 deg day in the sun. The fans will stay on for approximately 3 minutes. 2015 Fusion 2. Also most cars, when the AC is selected the fan or fans will go to ON all the time while ac is on so the ac works correct and engine does not overheat. Sep 12, 2008 · The fan can work at 2 speeds and on the faster speed the power steering fan runs also. I have never heard the inside cabin blower go on. It is a thermostatically controlled device that when With the engine running I turn on the AC and the fans run for a second or two, then they stop. Another set is turn on when radiator gets too hot or when ac is on. The AC itself is not operating as the compressor is turned by the motor. The reason that the fan does not have to work at these higher RPMs is that there is enough air coming in over the radiator that will be able to cool the engine. Re: Mini fan stays on when engine is switched off. The relay is activated by 24 volts when you turn on the A/C OR fan switch activation. 6 Vauxhall astra exclusive 2010 model Cooling fan running all the time. When the compressor cycles on, it also feeds a line to the condenser fan relay, running the fan. After a few seconds you should hear it fade out regardless of AC head pressure or coolant temperature unless it has mechanically failed. Fan Will Continue To Run Until Battery Has Completely 2005 Honda Accord When Ac On Radiator Fan Comes On When The Vehicle Is Idleing With The Air Conditioner On, The Radiator Fans Come On Too Frequently. #5 Super C , Nov 12, 2012 OEM Auxiliary Electric Cooling Fan . Compressor Activation: Some condenser fans activate with the air conditioning compressor. as soon as the air contitioner is turned on, the fan locks up and stays locked until the engine gets cold and all air is drained from the system. If you haven't driven the car much since last night, check your fuel economy bar graph display with the ten 3 mile increments. Apr 16, 2009 · You said you just had the lower put onI would check the wires going to the fan therm switch in the water jacket it is a screw in type right by the thermo housing it is a normally open circuit jump the 2 wires going into this switch at the connector and the fan should come on. The single cooling fan is supplied by a parallel circuit. Some of the other Manufacturers use to let the fan run after the vehicle was parked. I can go into a store and come out hours later and its still on. Last week fans stopped, the AC quit, and engine temp has started to fluctuate. I tested the fuses on top of the battery and they are OK. The electric radiator cooling fan assembly is  Jun 16, 2018 That depends on the car. Unplug it and both fans will stop. Cooling fans stay on at all times If the cooling fans are staying on at all times , this is another (less common) symptom of a possible problem with the cooling fan relay. Apr 17, 2018 · Engine fan stays on all the time when ac is on. At first I was concerned about wearing out the fan and causing engine damage. Even kicks on when its a cooler day. There is a definite time delay associated with it - only that i dont know the exact period. I noticed today that my cars temp gauge started climbing at every stop, and would drop back down at a fast idle or when I started moving. There is a fault code set in the engine computer that will cause it to operate in a failure mode in that it turns the fan on to be sure the engine will be cooled. Swap a relay? The fan will turn on after the temperature reaches about half. Fans come on without key in ignition. Also, if you are on the hairy edge of needing a recharge in the AC system it may be cycling on and off due to that. with AC off is the engine overheating. Why would there be any? When the engine is running, it drives the AC compressor which pressurises the refrigerant, releases it to the expansion valve and evaporator where it exchanges heat from the air in the cabin and gives cooler air. lights but my air conditioner does not work. The faster the engine is running the faster the fan will spin. The fan works to continue to cool our crazy hot running engine. 6TDCi can stay on for anything up to 2 minutes after the engine has been turned off. I replaced the blower motor resistor and the control unit with new parts from rockauto (ACDelco). It's a big load. five seconds after the car is off, there is a click in the dash and the blower goes on. One of the two large cooling fans in the front of the engine failed. May 22, 2013 · The sensor in the fan magnetic-coil assembly shares its reference voltage signal and ground with other sensors in the engine control system, including the range sensor. REMOVAL. Conditions being: 1. Same is not the case with any Maruti vehicle. Coming up with a message on dash ac off due to high engine 08/10 Mar 05, 2014 · Sounds like a bad relay to the cooling fan. Thought the fan was supposed to kick on when it reached a certain temperature then goes off once the temp drops. it lasted maybe a week or two then came back to what it was. An electric cooling fan that is not coming on when it should can cause an engine to overheat and poor cooling performance from the air conditioner. From the moment I start the vehicle the engine fan turns on and remains on several minutes after a kill the engine. this is normal is most cars. The engine temp sensor appears to be working ok because the temp gauge is working properly and the engine is not over heating. It will be moving but not very fast. That is considering having the air conditioner on. I have ordered a lot of five transistors to replace the one that fails in the power module, so I will see if a got into a bad lot of blower motor control modules if one with a new replacement transister doesn't fail. Close to 100% of the time when outside temp is 80 or higher. sounds like a bad thermoswitch. The condenser fan (if it has a dedicated fan) or the radiator fan most always comes in (with AC on) when the compressor discharge pressure (or, alternatively, the liquid line one; look for where a sensor or a switch is located on the high pressure line) rises over an operative threshold. Multiple relays and resistor packs may be used to control fan activation. Located on driver side of radiator facing engine, the auxiliary electric fan is intended to supplement your clutch fan and provide additional cooling when engine temperature exceeds approximately 215* as well as anytime the air conditioner is on. Jan 04, 2012 · the fan will stay on until the engine cools below whatever the spec is probably 190 degrees. Skipping stopped but now fans are running and killing battery. Some people say it has stayed on for 10-15 min (I don't believe that long though) When I lower my blower fan switch to off position it stays on low speed. May 14, 2016 So, my AC and electrical diagnostic skills go their workout today. check the temp sensor or relays out. Inside of your air conditioning unit, there is something known as the ‘blower’. Like the cars with AC, if a high coolant temperature exists with the ignition off, the contact in the thermofan switch closes and causes the cooling fan to run in slow speed (via Due to the transverse layout of its engine, the Pontiac Sunfire uses an electric radiator to pass additional cooling air through the radiator, keeping the engine from overheating during extended operation and stressful loads. Hope it stays like that by the time I take it to service next week otherwise the dealer is going to, of course, say they don't see You should be able to conduct an Output Test with the ECM (key-on, engine-off). This means that the ability to write new posts and access various member features will go away. (by increasing horsepower) at the same time. If the motor tests OK, check the cooling fan thermo switch, located at the bottom of the radiator on the driver's side. The temperature sensors for your cooling system have power all the time and when the temperature sensor reads a temp that it high it will turn the fans on until the temp drops. Check the fan connections. In that case, it makes sense to keep  Feb 26, 2017 In a nutshell: The radiator fan comes on so the A/C works at its highest efficiency. I noticed the fan comes on more often with the bunk A/c on as well. Engine temp rises (not seen on the temp gauge), and if the engine is idling, idle speed will bump up to c. exceeds 220 degrees and a\c refrigerant pressure exceeds 265 psi. This article will discuss a few reasons why your fan stays on after you turn your car off, and how to repair it. Could be a bad thermostat. My Low engine oil light came on yesterday so i bought some engine oil and filled it up, i then started my car and i heard a fan kicking in which i am assuming is a cooling fan, this fan stays on constantly when im driving and after i turn the car off it stays on for about another 5 to 10 minutes. After you plug in the two connectors to the fan the AC will only work for a short time before it heats up the AC relay and shuts the compressor clutch down. The engine fan on my 2006 1. Not when you first start the engine but just a min or two after and then for the rest of the journey. However, ever since this time, the engine fan will stay on, even late at night when it is only in the lower 60's. Engine suddenly began to run rough, most noticeable at idle. Plus, it sounds like a loud lawnmower! Electrical fan run for a long time after turning the engine off. The electric cooling fan switch is installed into a coolant passage and operates the radiator auxiliary electric cooling fan when the coolant temperature reaches a specified temperature or when the air conditioner is activated. I have a continuous knob not one with set speeds. Tiny Related Cooling Fan Stays On Content. 1) The Check Engine light is coming on as we pull a hill or riding the Jake down hill. I have checked the temperature sensor and it works ok, it actually does not turn the fan off if you disconnect it. To me, it sounds like a fan speed control is stuck in high speed mode. Car is cranking finethe radiator fan just comes on and stays onmay well be the K40 after reading through that thread (thanks) - will have a look-see next day or so and also check on the MAF Manic, maybe your solution is the best, just buy a new one before more ghost-in-the-machine issues arise! Will keep you guys posted - thanks! Q: Cooling fan stays on too long. Aug 27, 2007 · When the coldest position is selected in automatic operation the blower will stay on high and the air temperature actuators will stay in the full cold position. In fact, even your central air conditioner is equipped with a fan powerful enough to force air through your entire home. The problem in most cases is a bad ecm so in order to fix it the ecm will have to be replaced A/C radiator cooling fans run full. I have a 2001 Volvo S40 Turbo and have been having problems with the heater/AC Fan/Blower for about a year or so. Mar 06, 2011 · Im in Wisconsin and it 30F outside-- the car sat about 4 hours-- the fan shouldnt be turning ON-- likewise, the AC/heater controls inside the car are OFF. It is totally normal and typical, I am surprised you just noticed it. Sometimes these fans will cease to function properly. The fan clutch is designed to improve the vehicle’s cooling system efficiency while reducing the load on the engine and loss of energy caused by the fan itself. If the fuse looks good then it is probably good. If the fans don't come on at the temp. The other will cycle as engine temps rise and fall. The ac works fine as long as the fan is unplugged. The fan should 'ramp-up' from 0 to 100% and back to 0% speed. Inspect the radiator fan by spinning it with the fingers and see if it is free moving. The radiator fan keeps working until the temperature of engine comes to its normal state. If your car reaches those temperatures too soon you may have some issues with your water pump. You want to remove excess heat. This small fan cools the compressor. Sitting still it doesn't cool and the rad fan only seems to run when engine temp is calling for it. The three relays inside the dash, on the one relay for the fan number 85 is the ground, and that wire is a 239, the 86 on the relay and that wire is the 522 is called fan disable, and the 87 is the fuse 10 amp and thats number 220 wire, and the 30 is ignition power fuse thats a 226 wire. To test a fan motor, unplug the electrical connector at the motor and use fused jumper wires to connect battery power and ground directly to the fan. The headlamp module must be removed to access the relay. This happens to my 1995 frequently just a minute or two after shutting it off. When your engine cools down radiator fan also stops rotating or working so don't worry its normal. 2010 Ford F150, Radiator fan seems to be running on high more than it should. Feb 18, 2011 · OH #2: The engine cooling fan has conditions where it stays on when you turn off the ignition. Weird part is if I have the key in the run position but with the engine off, I turn the ac on and they run all the time like they should. Accessing the relay is fairly straightforward. My 2013 ford f150 electric cooling fan runs on high all the time. I have as of late been turning the engine fan on manually and leaving it on over night. I'd start the car with the hood open and the A/C off and see if the fans ever kick on. check engine coolant temperature sender and wiring. Replaced 3 main fan fuses today and skipping has retuned while ac is on. Jan 11, 2009 · ok one of 3 things have happened the engine fan is electric instead of air operated there is a switch on the high side ac line called a bianary switch it could have gone bad and on the right side of the cylinder head behind the thromostat housing there is the temp sensor the series 60 's are bad about the temp sensor going bad in the late 90's and early 00"s these can be checked with an ohm Sensors for radiator Fan ? What sensor ? The coolant temperature sensor is an input to the PCM - engine computer ! When the engine temperature reaches 200 degree's the PCM energizes 1 to 3 Cooling fan relay's in the battery junction box (fuse-relays ) The low speed fan relay , High speed fan control relay 1 , an high speed fan control relay 2 . This brings the A/C system pressure down to a proper With the engine running I turn on the AC and the fans run for a second or two, then they stop. Low battery power. It is a two wire motor. These engines normally run 200-225 degrees, they can handle much higher temperatures of course, but closer to the temps I noted are the normally what to expect. AC light & recirc light still light up and AC compressor clutch engages when turning fan on in AC mode, but not getting the fan to work. The cooling fans may continue to run even after driving less then 3. Posts: 1. Sep 06, 2007 · This setup cannot cool the potent 383 engine. If it has another manual switch in the dash to turn on the fan manually that is a totall of three switches it can have to turn of the engine fan. I have had a new AC compressor and all that goes with it replaced. May 16, 2012 · the engine was at idle speed,manual fan switch is in the manual position the water temp was 185 and intake air was 87 degrees tried a paper clip in the ac fan override switch plug and it didnt unlock it The cooling fan will come on when the engine is cold and it will stay on the entire time the engine is running. There are two coolant temp switches on the engine, one that turns on at 200 deg F (switch A) and one that turns on at 223 deg (switch B). 1k rpm. The only way to shut it off is to start the engine and then turn it off. The coolant temperature seems to run normally at the middle of the temperature gauge. if the air conditioner is kept off, the fans stays unlocked. AC compressor clutch engage then it will disengage. ) Jun 28, 2015 · 113* in Pasco, WA. this will bypass the pcm, and on the other fan you can just jumper the terminals on the relay block and you should have fan operation, which will verify if your fans are good. Today I decided to let the fan run while I put away groceries (about 5 minutes). The engine fan doesn't come on. If I turn the ac off then back on they do the same thing. Unplug the swtich and put a jumper wire on it and if the fan stops you found your porblem. Turn the fan speed on low and turn the AC to the coldest setting. i'm at a loss here and winter is coming. Perhaps there are some cars that, on very hot days, may even boil were it not for the operating fan. Defective alternator. Jun 14, 2016 · When the vehicle has the AC on, the engine needs extra help cooling so the ECU commands the fan to be on any time the AC is on. Jun 22, 2014 · The ETC and AC tables are an OR condition whichever occurs first starts the fan and the highest percentage between the two tables is used. I read in the service manual that the 2004 Malibu Classic with the Ecotec engine will run the cooling fan: "After the vehicle is shut off if the engine coolant temperature at key-off is greater than 140°C (284°F) and system voltage is more than 12 volts. I will be assisting you with this issue today That is normal the fan kicks in when A/C head pressure gets too high. If the relay shorts internally, it may cause power to be permanently switched on, which will cause the fans to run at all times. If the cooling fans are staying on at all times, this is another (less common) symptom of a possible problem with the cooling fan relay. The aircon is off and makes no difference whether it is on or off. are working properly and the high side pressure is staying right at 150. It’s normal for some vehicles to have a fan run for a few minutes after the car is shut off, generally to keep the engine cool. not to mention because The condenser fan (if it has a dedicated fan) or the radiator fan most always comes in (with AC on) when the compressor discharge pressure (or, alternatively, the liquid line one; look for where a sensor or a switch is located on the high pressure line) rises over an operative threshold. Check 3 pin connector on alternator is plugged in properly. there is no engine driven mechanical fan. The A/C fan will start to stay on longer as the pressures rise in the high line for temperature exchange. The DPF (diesel particulate filter) generates HUGE heat, hence the fans (both) are running on high, pulling air through the radiator, around the engine, and exiting below the firewallthat's why you feel it under the body of the car. The air conditioner actually runs fine, even though the warning says" air conditioner shut-off due to engine overheating"(neither is true). Oil level is fine (topped it up a few weeks back) and coolant level seems fine. I just had Jan 23, 2019 · In today’s modern vehicles it is considered normal for the engine cooling fan to keep running for a few minutes after you turn off the car. Hello, I just bought a used 2005 Outlander with 41k miles. The fan only runs when needed to help cool the engine. The fan doesn't seem to be running while the engine is still running, but it comes on if you shut the engine off. Jul 15, 2018 The most common reason that your Air Conditioner fan won't turn off is because a stuck relay keeping the circuit closed. or it your air fan switch that is up by your overflow and that can be going take the two line off turn them around for a min and see if that get it off if not try to get one I ask because the fan staying on after you turn off the car is normal behavior. Jan 26, 2009 · you can jumper the relay to force the fan to turn on, supply it with ground, and you can test the fan. Inside the cabin there is a separate fan to take care of this. I changed the low speed fan and high speed fan relays and get the same result. The vehicle was towed to nick alexander Mini (6201 alameda st, los angeles, CA 90001) where it was diagnosed that the power steering pump, alternator, and radiator cooling fan failed and needed to be replaced. That was the original complaint, the engine fan stays on all the time. Other cars the cut in range may be lower. Fan Stays ON After Turning Car Off ?! General Community. If the fan is not Jul 18, 2013 · The fan is mounted between the radiator and the engine and is the main engine cooling fan. . Dec 05, 2009 · 1. May 27, 2010 · If it is an old draft induced furnace with a fan/center relay, the relay you need to get would be a double-pole, double-throw relay with a 120-volt rating and a 24-volt coil. The engine coolant sensor or a separate engine temperature switch is used to monitor engine temperature. Early 944s without air conditioning were equipped with a single radiator cooling fan as opposed to two fans. DIfferent fan. My car has an automatic transmission. and it does not matter is the pressure switches in the air I believe your ac is always on as you have to press EC or 0 to stop it and the fan. If it's hot out, then sometimes the fan will say on for a minute or two after you shut off the engine. No they should cycle like that, one fan is for engine cooling the other is for A/C. Only 36,200 miles. But I figured what is the difference if the thing is cutting in all the time. This is the third time this week where after I turn the knob to off, the engine stays running. My rad fan IS ALWAYS ON when the engine is on. A/C radiator cooling fans run full speed 90% the time when A/C is first turned on, even at cold engine start. The APAds control unit sends a signal to the ECM to turn on the engine fan when the high pressure switch switches. the car was run above a certain power level in the prior 6 minutes before ignition is off 3. The fan can come on at any time even with the key off when the engine is warm. Fan kicks on about 30 seconds after vehicle is started and is extremely loud. 3. Most cars will switch the cooling fan when the coolant temperature reaches 85 degrees Celsius (185 degrees Fahrenheit). Go to autozone's website and look for the wiring diagram and trace out what components The fan temperature sensor is usually located on the engine block or radiator. if engine not overheating assume all function normal. The contact stated that the when the vehicle was turned on, the fan underneath the hood continuously ran. So: 1) Its ok, but neednt cut in immediate also. It does not seem no be over heating and is driving fine. Walt 2004 Taurus SES 350,889 miles - original engine Still running like new Apr 27, 2009 · DavidT. When the radiator fan does not work, this is a serious problem. The light stayed on. Short time later check engine light came on and stayed on. Capacity information is found on the AAC refrigerant fill sticker, located under the engine hood (bonnet). The engine is still much hotter than the coolant. Blower motor stays on. Loose or defective alternator belt. I have a 2007 ML350 and the battery died the other day because the blower/ac stays on after the car is off and key is out. My previous E36 and E39 fans are very loud when running at full speed too. My Cars Cooling Fan Runs Constantly When The Ac Is On Or When I Am Using  Jun 23, 2017 Escape & Escape Hybrid - 2012 Escape - A/C issue - Radiator Fan Related? of the radiator cooling fans ( 2012 Ford Escape Engine Cooling Fan . I discovered it each day these past 2 days after I had been home for over an hour. Jan 23, 2007 · To do a basic test, with the engine running turn on the AC, both fans should come on. Toyoto Camry 2013 Radiator fan stays on after car is off. However, if the fan is running for an extended period, the fan itself can become damaged due to overuse. Some of these fans have a clutch that will allow the fan to stop turning when the RPM reaches a certain level. stays off when engine is off but everything else is. Reading threads, it sounds like several possible issues. t. Shortly after the engine starts the malfunction indicator light (MIL) illuminates. , never heard this fan before so i am a bit Jul 28, 2012 · The three relays inside the dash, on the one relay for the fan number 85 is the ground, and that wire is a 239, the 86 on the relay and that wire is the 522 is called fan disable, and the 87 is the fuse 10 amp and thats number 220 wire, and the 30 is ignition power fuse thats a 226 wire. - G3. Starter solenoid connector pulled off or corroded. The after-running process prevents excessive engine compartment temperatures caused by the diesel particulate filter regeneration cycle. Engine fan stays on, when using the AC on a hot day. Install a jumper wire to the red wire at the harness connector and the black wire to ground. After turning car off cooling fan stayed on several minutes, which it had never done before. You should hear a low "hum" followed immediately by the cooling fan turning on. Recently my car's battery died twice and I had to jumpstart it without knowing why it died (I didn't have lights on or anything like that). It was about 65 degrees out and  Sep 13, 2015 When the return coolant temp exceeds a certain value, the ECU runs the radiator cooling fan, first on low speed, then on high speed if low . I talked to a Mini dealership, and if the coolant temp sensor can't measure how cold the coolant is, it can't tell if it's too hot or too cold, just too far to measure. We do also have a written DIY on replacing the water pump of an E46 3-series (99-05), such as yours, Mar 28, 2009 · Most cars (GM for ex) the fan will not come on until the coolant gets to about 210° Farenheit. Turn off the AC and both fans will shut off, unless the engine temperature is above 225 degrees. This happens after each trip. No complication, the AC radiator and Engine Radiator fan doesnt feed air inside the cabin. check for codes. I think this is standard on European specification cars, not sure about others. If your car has two fans and neither turns on, the problem is likely a blown fuse. Oct 07, 2017 · The problem is low coolant, which is making the engine hotter than normal. your cooling fans will still run after your car is off to cool down the radiator which is hot from you driving. The fans won't run a long time doing this, and the computer knows not to run the batter down when doing so. I know that the fans will typically stay on after turning thr car off, but i am positive that this is the engine staying running. See all problems of the 2003 Volkswagen Jetta . I have a 97 FLD 120 with a series 60 engine. The fan helps cool off the radiator, which acts as a heat sink drawing heat away from the engine. Why would there be any? engine cooling fan stays on permanently At some point during the month of August the Roadfly forums are going to become archive only. But then surprisingly, it also does this when it's below zero. The PCM commands the high speed cooling fans on during the following conditions: engine coolant temp. The engine fan does run to cool the engine off after I have turned off the car - this is typical on a hot day. Coolant fans not running when ac is turned on. Eco 1. I always thought the CEL was related only to the emissions Jul 04, 2011 · Why does my A/C blower motor stay on when i shut my car off? I have a 2005 Chevy Impala that all the sudden when I shut my car off the A/C blower motor stays on when I shut my car off. 2010 GMC Terrain, Engine fan stays on the whole time the engine is running even when cool. It normally goes away after a few miles but now the loud fan noise is on all the time, especially high RPMs. Or possibly an unhealthy amount of air in the coolant system. If the coolant temperature sensor is damaged or the wiring to it is shorted this will cause the fan to run . BMW N43 Engine Oil Pressure Control. Here is the explanation why it comes on with the AC:". Automatic idle control will try to keep it running, and it will vibrate. i have already replaced the coolant temp sensor. If it is a PC Board or Computer Control Board/Box, you need to replaced the entire control. On my S500 the fan only runs if the AC is ON. fan comes on only when needed. If so, replace the switch and all will be good. The AC will come on even if it's cold outside when you turn on the defrost. 6 Focus (1. Anyway, it held steady at that temp for a good half hour and even though the temp never reached 210, the fan kicked on and stayed on. My damn cooling fan stays on for at 4 minutes or more, after having turned the car off. Naturally I looked to see if the fans were working. So, the engine wouldn't cool below 200, but wouldn't heat to 210, when the fan automatically kicks on normally. The engine control computer thinks the engine is running hot. On a freightliner, the sound of the compressor starting is unmistakable. A qualified technician, such as one from YourMechanic, will be able to diagnose your overheating problem and perform any repairs required. Find the answer to this and other Vauxhall questions on JustAnswer Blower motor stays on 300M Car Forums . fans are only running on low. a belt connects the primary and Jun 13, 2012 · Even with the AC off, the cooling fans should cycle on and off when the coolant temperature reaches around 205-210 degrees F. I hit AC Rest twice and it goes off, only to go on five seconds later again. Jun 23, 2007 · The fan will come on when the AC is on. " Jan 26, 2009 · scan tool is only going to tell you so much, diagnosing why the fan isnt working is what we are trying to figure out. the answer is your check engine light. Do this only with the engine off and cool. now it staying on for 10 mins is not a fan issue, but more of a heating issue with the engine. While using the AC, engine fan comes on and sometimes stays on for long periods of time. The part must be replaced to prevent engine overheating. Fan Clutch test First, lets discuss what the fan clutch does and why it is there. I had the same exact problem. However, if the fan is  Jul 28, 2008 I immediately opened the hood and saw that the AC radiator fan was running at full . Blown Fuse. Dealer replaced valve cover, and intake manifold for $1100, out of warranty. haha. 2005 Mitsubishi Outlander engine or fan runs after being turned off. Begin by removing the weather strip and then the plastic cover that goes over the battery, ECU box and cabin air filter housing. [toc] The cooling fan or fans are mounted right behind the radiator which is at the front of the vehicle behind the front grill. When using the AC during the morning or at night or when the sun not fully out the fan comes on but shut off after bout 30 sec to a min. Is the fan staying on all the time or something or not comming on at all. Well if fan clutch solenoid is good and with AC turned off and it still runs it must be the temp sending sensor for the fan clutch solenoid it should be on passage side of engine and normal towards the front. So, by adding coolant, the fan won't stay on after you shut the engine off. Extra cooling is not needed when a cold engine is first started, so the fan does not come on until the engine reaches normal operating temperature (195 to 215 degrees). The fan shuts off automatically after about 5 minutes. Small cars typically have stacked AC and engine radiators cooled by a single fan. If the AC is OFF the fan only runs when the engine gets hot. The fan seems to stay on until about 4,000 rpm, at which time the fan will be at full speed, then I will here a high pitched mechanical squeal for one second, and the fan seems to disengage. Radiator fans works even if the supply is off and even if you shut down your engine. This is not the fan that cools the engine. Remove the three T30 Torx screws in the front of the box. then it will stay unlocked until the air is turned back on again. OH #2: The engine cooling fan has conditions where it stays on when you turn off the ignition. If you start the engine and the fan starts to run then press EC or 0 and the fan stops, then switch the engine off key and start the engine again, do you need to press EC or 0 again to stop the fan? The radiator fan on a Saturn should give you years of trouble-free performance. My 2002 LS radiator fan is always running and very loud. Only increases speed with AC on, but not very fast just little difference. Fill the system with the specified amount of refrigerant and oil. Apr 30, 2012 · The after-running of the cooling fans is deliberate and can sometimes last up to 16 minutes after switching the engine off. It's a classic sign of the air conditioner compressor fan going out. The fan or blower in the car's AC system is simply blowing air and there is no cooling effect. The guys at freightliner say its just hot out today and all the computers say all is good. Aug 24, 2011 · Engine fan is constantly on. Even when engine cold. check the sensor to the fans and also check your coolant levels. Should the radiator cooling fan always run when the a/c is on? (2005 Chrysler PT Cruiser) If so, I changed the low speed rad fan relay and it still won't run with a/c until the engine thermostat turns it on. I replaced mine on my own, but only because I had the extra I had noticed several weeks ago The high speed fan coming on and off more frequently. "On this vehicle, the cooling fan and A/C compressor operation are controlled by the J293 fan control module, which is usually located in the driver's front corner of the engine compartment on the lower frame rail. If the fan magnetic coil assembly shorts, it can pull the applied voltage too low, affecting the signals from the rest of the sensors in the circuit. May 23, 2013 · BMW and MINI Electric Engine Cooling Fan Stays Running – Auxiliary Fan. The A/C condenser (the part which sits in front of the coolant  Jan 23, 2019 [toc] The cooling fan or fans are mounted right behind the radiator which the heat stays trapped therefore prolonging the engine from cooling. check relays and fuses. My engine fan runs almost constantly. I know this because if you put the relay in the freezer for a bit and plug it back in the AC goes right on and runs. Jan 27, 2012 · 1 Answer. 2007 Camry, A/C fan on when engine off?? I have a 2007 Camry. It ran almost a constant 4 hrs last week on the road @ 73mph with an empty flat bed. The fan will then cycle on and off as needed to maintain the coolant temperature. As soon as I start the truck the fan comes on and stays on, cant seem to figure out what might be causing Check that the ac high pressure switch is correctly plugged in. In the past few days the engine fan continues to run after only short trips (3 miles). MVB-137 will show you some AC system status/request info. When your air conditioner is on the engine fans run all the time, but when it's not it depends on a thermostat and relay for them to kick on at a certain temperature. simple as that. I am not an idiot. Once I put the key in the ignition and turn the key, the fan will turn off. ok look next to the fan there is a air line comming out on myh truck it is pupper and it could be cut or open and that will keep your fan on. Left the car at my dad's and the fan ran for a bout 10 minutes after it was turned off. engine fan stays on when ac is on

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