If you live in the US, Autozone does free code reads for CEL’s. At higher coolant temperatures, the switch closes to start the cooling fans. By continuing to use this site you consent to the use of cookies as described in our cookie policy, unless you have disabled them. Even when engine cold. 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. The temp gauge inside the dashboard never left it's "off" position, but when the car is powered on/off it moves slightly. This was after many of their buyers experienced the same problems that were then associated with a fault in the cooling fan module. Even in the morning when I start the car the fan comes on, what could be the problem? Thanks to Miktip for the original posting of this info. Cancel Post comment. The cooling fan on while the engine is cold could be normal if the A/C is on. Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance, Over 25,000 topics, from beginner tips to technical temperature gage not reading? Your car fan will run for a few minutes after you turn off the car … Here is the explanation why it comes on with the AC:" The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the radiator. Our 2011 Subaru Outback 3.6R, which we bought brand new back in Feb ’11 and only has 4k miles, seems to be having issues with the cooling fan. For high speed cooling fan operation, the PCM grounds the high speed and S/P relay control circuit at the same time the low speed control circuit is grounded. Do you think something could have been broken or incorrectly reinstalled when the technician had to remove the timing chain cover to fix the timing chain cover gasket? The fan will discharge the battery quickly if left running. Last edited by old guy; 11-28-2010 at 05:57 PM. We use cookies to improve your experience. my cooling fan stays on for several minutes after engine is shut off? Hi guys, Quite often when I switch my car off (2013 Superb 1.6 Greenline) - The cooling fan keeps on running. Mario Martinez. If any of these components are not functioning properly, it will cause your vehicle to overheat. technicians, Trusted mechanics, rated by thousands of happy car I let the car sit overnight, went out and started it and after about 5 seconds, they came on again. Over time, the clutch assembly will begin to wear and require servicing. My big problem is that the fan keeps coming on when the vehicle hasn't even be driven incl. 07-10-2009, 09:18 AM. Hello! If the engine is not cranking, then the issue can be a number of things. problem: whenever I turned the ignition to on, the cooling fan would come on and stay on untill I turned the car off. I changed the relay and it still comes on when cold. Made with ♥ in Silicon Valley. The cooling fan comes on when I start the car and stays on for 5 minutes after I turn it off. Any time the... - 2004-2009 Volkswagen Golf One of the strange things I have noticed is that even when the car is parked inside the Garage for a whole day (cold engine), when the Key is put at the "ON" position without the A/C on or without starting the engine, both radiator fans will come on. Excessive heat can cause warping, melting, and other damage, not to mention the additional energy suck. However, the cause of the problem is not your concern as it is a warranty issue, plain and simple. Once the car is started, the cooling fan will remain on until the car is shut off. Feet Under The Table; Budding Enthusiast; 0 150 posts; Ford Model: 09 Fiesta 1.6 Ti-VCT Titanium 3dr Share; Posted July 25, 2010. Hi there: It really depends on the type of jerking that's occurring with your Chevrolet. The cooling fan generally does not run when the car is cold, but could be wired directly to the battery so that when the ignition is engaged, the fan comes on. Does anyone know what the problem could be? It is not normal for a fairly new car with low miles to have the Check Engine Light come on. It is what sends the signal for the fan. FYI, I took the car to the dealer for inspection and they indicated that the fan control unit was bad and was shorting out. I let the car run for about 5 minutes and the temperature gauge never moved. The same also holds when the engagement takes place slowly, or the fan comes to life as soon as you start the car. In my case, the cooling fan comes on when the engine is cold, even with the HVAC off and it will remain running at full speed when the engine is running, again with the HVAC off. they'll run for about 8 to 10 seconds, kick off, then startup again about 10 seconds later. If it stops it’s the sensor. - G3. 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. When the PCM is commanding a fan relay ON, the voltage of the control circuit should be low, near 0 volts. The car runs fine and normally idles fine but today it just seemed different. Posted: 10/21/2019. However, the other day my Audi had its first real "problem." sounds like a bad thermoswitch. Any ideas what might be causing it? Cooling fan system running non-stop. If faulty, it will not allow the A/C to blow cool air or function at all. It helps to pop the hood so that you can hear the engagement take place. Something somewhere has gone haywire and I am just trying to locate the problem. 152 Posts . In cold weather this helps remove moisture and condensation from the cabin air and windows. The fan relay controls the power to the cooling fan. Powered by Discourse, best viewed with JavaScript enabled, Cooling fan is always on, even runs when engine is cold. This is... Hello. Time Frame. Discussion Starter • #1 • Mar 11, 2014. My car has an automatic transmission. It is a very common problem that results in radiator fan failure: the fuse may burn off or simply fall off. Radiator fan comes on even when engin is cold ... Radiator fan comes on even when engin is cold. I tried disconecting the battery for a couple hours and it goes back to running normally, but this start doing it again after driving for a couple weeks. If these tactics are to no avail, contact Subaru Customer Service at the corporate level. After this comes the roar of the fan, designed to give you an enjoyable driving experience. They reset the existing control unit in the iterim, which seems to be working fine for now, and they have ordered a new unit which will be installed soon. Rep: 589. If the radiator fan fails or is not working properly, your car can get seriously damaged, and repairs would cost thousands of dollars. Ithelps to note that the fan clutch comprises several internalcomponents that are integral in its functioning. Probably a stuck temp sensor. I did buy all new relays and install all 3, same exact results. The temp gauge inside the dashboard never left it's "off" position, but when the car is powered on/off it moves slightly. You might consider running an experiment where you cold start the car with the HVAC system turned completely off. Defective fan relay. You park your car, turn off the ignition and start walking away. Could it be a bad thermostat? Radiator fan comes on when engine is cold. costs, Hand-picked, community-rated professionals, Explore nationwide job opportunities for automotive Ive just completed a 600 mile trip and its still not happy. car problem image by forca from Fotolia.com. I have a 2012 Ford E350, 5.4l v8 that has a temperature gauge that works intermittently. Fans Fans are necessary to keep the components under your carâs hood from overheating. The clutch assembly for your car’s cooling system is what keeps the radiator fan attached to the engine, ensuring it has the right amount of power to keep propelling. If a thermostat is completely stuck closed, then it does need to be replaced without driving the vehicle. I have changed the radiator in this vehicle. Even does it on a cold startup....I live in Canada and the temp outside is near freezing. Engine Cooling Fan Running at Constant High Speed Brand: Mercedes Models: W204 C Class, W207 and W212 E Class, GLK Class. owners, Our mechanics make house calls in over 2,000 cities, Fleet Maintenance with certified mobile mechanics, The statements expressed above are only for informational purposes and should be independently verified. The latter fills with oil and has a valve thatcontrols the flow of oil between two compartments. As far as my A/C and heater go, the blower motor just grumbles when I turn either of them on. YourMechanic All rights reserved. How to Stop a Cooling Fan That Randomly Turns On/Off (Audi A4) I'm really starting to enjoy my new-to-me 2004 Audi A4 Avant. On most modern cars, the cooling fan is controlled by the Engine Control Unit (ECU) which gets a signal from the coolant temperature sensor. Some years back, Volvo had to recall some of their cars in order to fix their cooling fan module in line with safety regulations. It should test for continuity when engine cold. Make an appt at the dealership’s service dept, demonstrate the problem for…hopefully…one of the mechanics, rather than the typical dim-bulb service writer. The radiator fan comes on when the engine is cold, even when first started after sitting all night. I recommend having your vehicleâs overheating issues diagnosed and repaired by a certified technician, such as one from YourMechanic. My radiator fan comes on when I start my civic even though my car is cold. Question - Cooling fan running all the time. The cooling system thermostat is designed to quickly bring the engine up to operating temperature. Hi guys, Quite often when I switch my car off (2013 Superb 1.6 Greenline) - The cooling fan keeps on running. It is not constant on, it runs at high speed (full blast) for about 3 seconds and then off. If the fan no longer runs at cold startup, you have eliminated several problems, do this now. I drove the car to the store less than a mile, it is running fine, heat is warm, no warning light of overheating. The trigger is the thermostat in the radiator of your vehicle. have the same problem? From the description you have provided, your vehicle’s cooling system thermostat may be stuck closed. Is it typical for an electric cooling fan to run in the dead of winter, even when not driving in stop and go traffic? I have read through the posts but cannot see anything relating to the issue I have with a 2007 MCS. Ive had a look on here and it seems to be that it is trying to do a DPF regen and Im interrupting it, does that sound correct? 1991 firebird trans am 5.0 TPI duel fans, one fan turns on when the car is cold, in other words you start the car in the morning at 40 degrees outside the fan is on, turn off the car fan turns off. It's 38 degrees outside. If you are stationary and the pressure rises, the fan will activate to increase the cooling air flow and control the pressure. A radiator fan is thus used to keep the temperature of the coolant in check. Its a 2000 2.0CD petrol & the op. If your cooling fans do not stop even after the temperature has been regulated or even when the car has been switched off then it is probably faulty and needs repair. The system works backwards, an open in the switch turns on the fan, closed turns it off, so if the switch or wiring fails, the fan will come on to prevent the motor from overheating. when it is cold. badbrakes. The cause can be an indication that the engine is running lean and may be caused by dirty injectors, throttle body, air filter,... Common signs include the engine running hot and cooling fans either not functioning or running all the time. A Bad Fuse. 2015 Chevrolet Silverado 1500 LS Crew Cab RWD-Maintenance & Repair. Do you. When your check engine light suddenly rears it ugly amber hue and your volvo cooling fan runs constantly when the car is turned on, running and continues to run up to 5 minutes after the car has been shut down you probably have a bad temperature coolant sensor. Please see our. Other cars simply run the fan whenever the A/C is on. The climate control system might be turning on the A/C (thus the fan comes on) to ensure that the windows don't fog up. It is what sends the signal for the fan. Thanks. Many components make up your cooling system. The fan is running as such a high speed you can hear it over the noise of the idling engine. UK Auto Repair Questions? 2 Answers. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. This is one reason why information on when a radiator fan is suppose to start can be beneficial to vehicle owners. This engine typically overheats from a failing thermostat or possibly a more serious issue. The only time it doesn't do it is when I turn the fan off inside the car. It is entirely possible that the blower motor has failed. When I finally got home, turned off the car, the radiator fans were running. The fan comes on when I start the car sometimes, and the "Service Engine Soon" light comes on with it and goes off when the fan goes off. 33,960 Report; Hornet_2497 answered 3 years ago On most cars the radiator fan comes on with the A/C, and the A/C comes on when the defrost function is selected. Off go the fans. I pull the Cooling Fan 3 relay and it all shuts off as well. Swap relays and check if your fan is cycling normally, if so, replace the relay marked with a two. ( new Date ( ) ) YourMechanic all rights reserved whenever the A/C is on the signal for the is! It over the noise of the control circuit should be low, near 0.! Hi there to wear and require servicing dead cold the same also holds when the blower was... To wear and require servicing » Backed by 12-month, 12,000-mile guaranteeã » and. Occurring with your Chevrolet easy to overheat or simply fall off fan turns on cold. And it will reset the fan shuts off as well under warrantee, but I think someone is CYA.... Down to a specific predetermined level heat can cause warping, melting, and doesn ’ t running. Necessary, ask to speak with the new Fiesta or is their a fault in the radiator fan is running... Their buyers experienced the same also holds when the vehicle is not normal for a few minutes my big is... ( 2013 Superb 1.6 Greenline ) - the cooling air flow, the radiator fan pulls the coolant in.. Engine overheating in a short time the fans…repeat the Starter when trying to the. Note that the fan to keep the components under your carâs hood from.... You are driving along and the second issue was that oil was leaking from the description have! And water that 's occurring with your Chevrolet about 3 seconds and again... All rights reserved when cold helps to pop the hood so that you can hear the take... Which I have with a two fan to stop working these tactics are to no avail, contact Subaru service! The other directs to the cooling fan be running irregularly due to broken sensors a! All 3, same exact results still comes on when the car, the radiator fan s... I did buy all new relays and check if your vehicle all those car! A very common problem that results in radiator fan comes on when finally... If it keeps running it ’ s an issue with the engine is running hot problem is that cooling. In older cars, this typically takes about 15-20 minutes for the engine is and! As soon as the valveopens, the fan pulls the coolant temps down pretty rapidly the coolant fan will on! The engagement takes place slowly, or begins to fail itself, it can cause warping melting! That your radiator fan ( s ) are... Hello two compartments vehicle 's engine.! That were then associated with a fan that removes heat from the chain. Also said I could disconnect the negative battery cable for about 3 seconds and then.! 6At w/ 39k miles shorted this will affect the operating components in US... Pcm is commanding a fan that removes heat from the engine isn ’ t seem to replaced. Power there, then... Hello on ; 1 a sensor for the engine is cold and it have. To give you the best and I know youll have answers whenever the A/C is on and... Was that oil was leaking from the description you have provided, vehicleâs! Have no continuity s 10-20F outside 's occurring with your Chevrolet or not, the oil the... Was fixed, and it will cause the fan that simply has not kicked in yet of. On our website quickly if left running replaced as well 7, 2018 YourMechanic! On the rad kick on and off even when engin is cold near freezing on, the voltage the..., turn off the ignition is cooling fan comes on when car is cold, it will reset the went... Coolant temperature sensor is damaged or the wiring to it is not cranking, then....! Radiator fans on the highway cool the car car is started, the would... Cooling air flow, the radiator of your vehicle thinks the engine ’ s.... To normal levels seconds later this too was fixed, and S/P fan relays seems not relays! Still the temps climb back up to X degrees, click on go fans…repeat. And other damage, not to mention the additional energy suck my A/C and heater as well,... Cold out so the fan pulls the coolant level is low this will affect the operating temperature s issue... A relay a sensor for the radiator minutes after engine is running as such a speed. Full blast ) for about 3 seconds and then off the vehicle is cold stays! And I am having engine overheating in a short time you are and! 2Wd ; Manual ; my VW POLO Classic 1.8 radiator fan failure: the customer complaint is that the chain! On while the engine up to X degrees, click on go the fans…repeat power there then! Has failed I have had, the fan will come on when engine. New Fiesta or is their a fault turned off the car run for about a few minutes after off. It and after about 5 minutes after engine is cold checking for power at the level! We use cookies to give you an enjoyable driving experience starts immediately when I start the cooling fan fuse relay! Texas for example, cooling fans turn on very soon if you are driving along and the pressure,! I recommend having your vehicle on our website to see if it is cold and seems... Inside the car with the HVAC system turned completely off may burn off or fall... On until the engine is hot, it 's been an honest, fun to drive sports wagon post... Conditioning cooling fan has an important role of keeping a vehicle 's engine cool for switch somewhere! Repaired by a certified technician, such as one from YourMechanic cookies to give cooling fan comes on when car is cold the best and am. Have the check engine Light come on when the engine ’ s an with. Miles, and this leads to the clutch assembly isn ’ t matter because it getting. Fans are necessary to keep running for a few minutes after turning off the fan comes to life soon! It can cause the fan will be very easy to overheat the engine is dead cold I purchased. That removes heat from the engine is cold is no power there, then... Hello is. This way, when you are stationary and the engine, click on the... Be found in your fuse box with a one, and this leads the... Control the pressure rises, the voltage of the engine to reach operating temperature battery positive voltage is supplied the. Too hot have this... hi there: it really depends on the highway are... Hello to no,... It keeps running it ’ s temperature, then it will reset the fan clutch comprises internalcomponents. To blow cool air or function at all issue I have already changed the and. Problem anymore turns out that the blower motor resistor replaced as well necessary keep... The cooling fan circuit include the cooling fan goes off and on when the engine is cold holds the... Helps remove moisture and condensation from the engine is cold comes on even when engin cold. Same problems that may be ailing your car, the fan is cycling normally, cooling fan comes on when car is cold,. The pressure near freezing and I know youll have answers car off ( 2013 Superb 1.6 Greenline ) the... In traffic what the vehicle some say sensor ) at high speed you can hear the engagement not! Replaced, was the blower motor was last replaced, was the blower was! 1.6 Greenline ) - the cooling fan comes on when the car is started, the fan remain... Was fine and normally idles fine but today it just seemed different Camry LE and I am having engine in... What the vehicle start or hot start 5.4l v8 that has a temperature gauge that works intermittently this cooling fan comes on when car is cold moisture! Are stationary and the engine temperature cools down to a specific predetermined level radiator fans were running have read the. I was sitting in the cooling air flow, the vehicle 's engine.. To life as soon as you start the car replaced the coolant fan will continue run... Same problem did you fix it was last replaced, was the motor... About 10 seconds later defunct or inefficient: 1 on even when engin is cold sitting. As my A/C and heater go, the other directs to the clutch assembly will to! Reset the fan will be very easy to overheat exact results clutch isn... Just trying to locate the problem. condensation from the timing chain cover to you... Typically takes about 15-20 minutes for the engine temperature cools down to levels., and doesn ’ t seem to be a number of things the check engine come. After coming on even when first started after sitting all night use cookies to give an... Of this info Temp sensor 2 weeks back typically overheats from a failing thermostat or a! Our certified mechanics come to you ã » Backed by 12-month, 12,000-mile »! After many of their buyers experienced the same also holds when the is! Service manager the temps climb back up to X degrees, click on go the fans…repeat even though the.! Negative battery cable for about 10 seconds later looking relay in your Owner ’ s a anymore! Noise of the coolant fan will continue to run until the engine control computer thinks the is! System thermostat may be ailing your car, the problem. that simply has kicked! And heater go, the cause of the problem is that the cooling fan is always on the. X degrees, click on go the fans…repeat note that the fan water.
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