Your cooling fan comes on when the car reaches a particular temperature. It … On most modern cars, the cooling fan is controlled by the Engine Control Unit (ECU) which gets a signal from the coolant temperature sensor. It should test for continuity when engine cold. My speed fan comes on as soon as i start the car even with no AC on even when the car is cold i was talking to some guy - Answered by a verified Auto Mechanic . If it is not opening then it will be very easy to overheat the engine. If the engine's RPM is surging while the vehicle is in gear, the issues could be caused by a mass air flow sensor, O2 sensor... Hi there. Rep: 589. This problem of a slight jerk feel is what is known as a lean tip in surge. In addition, the vehicle is not equppied with a sensor for the radiator. Also, mark a similar looking relay in your fuse box with a one, and mark your fan relay with a two. 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? Just purchased the car, 2012 LTZ 6AT w/ 39k miles. If faulty, it will not allow the A/C to blow cool air or function at all. It is what sends the signal for the fan. The same also holds when the engagement takes place slowly, or the fan comes to life as soon as you start the car. I JUST replaced the Coolant Temp Sensor 2 weeks back. As far as my A/C and heater go, the blower motor just grumbles when I turn either of them on. I have changed the radiator in this vehicle. My car has an automatic transmission. If necessary, ask to speak with the service manager. Do you. Car engine running cold but the radiator fan comes on? However, that doesn’t mean that sensors won’t fail. If the engine is not cranking, then the issue can be a number of things. Hi there: It really depends on the type of jerking that's occurring with your Chevrolet. andy64 0 Posted July 25, 2010. andy64. Quote ; Link to post Share on other sites. 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. Time Frame. 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. they'll run for about 8 to 10 seconds, kick off, then startup again about 10 seconds later. What causes cooling fans not to come on? problem: whenever I turned the ignition to on, the cooling fan would come on and stay on untill I turned the car off. If you are stationary and the pressure rises, the fan will activate to increase the cooling air flow and control the pressure. Ithelps to note that the fan clutch comprises several internalcomponents that are integral in its functioning. On older vehicle models, just wait about 15 to 20 minutes for the engine to reach operating temperature. cooling fan goes off and on when car is completly cold cooling fans go on and off even when engine is dead cold. FYI, I took the car to the dealer for inspection and they indicated that the fan control unit was bad and was shorting out. This too was fixed, and doesn’t seem to be a problem anymore. Is your air conditioning turned … In cold weather this helps remove moisture and condensation from the cabin air and windows. Hi guys, Quite often when I switch my car off (2013 Superb 1.6 Greenline) - The cooling fan keeps on running. Yes. EVERYTHING on your car is covered by the Bumper-to-Bumper Warranty (Subaru calls it the “Basic” warranty) for 3 yrs/36k miles, and the engine and transmission are covered for 5 yrs/60k miles by the Powertrain Warranty. I changed the relay and it still comes on when cold. That issue was fixed and is good now. Is this normal with the new Fiesta or is their a fault? If there’s a problem with the engine’s temperature, then this can damage the radiator. document.write(new Date().getFullYear()) Your car fan will run for a few minutes after you turn off the car … My radiator fan comes on when I start my civic even though my car is cold. Swap relays and check if your fan is cycling normally, if so, replace the relay marked with a two. Discussion Starter • #1 • Mar 11, 2014. If the fan's kicking in as soon as you start a cold engine, and the air con's turned off, then I'm sure that this is a fault, unfortunately. When the PCM is commanding a fan relay ON, the voltage of the control circuit should be low, near 0 volts. 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. Hello! As the valveopens, the oil enters the clutch, and this leads to the fast movementof the fan. badbrakes. Probably a stuck temp sensor. 2015 Chevrolet Silverado 1500 LS Crew Cab RWD-Maintenance & Repair. 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. I have a 2011 silverado. If the coolant temperature sensor is damaged or the wiring to it is shorted this will cause the fan to run . It is entirely possible that the blower motor has failed. 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. Monday, August 1st, 2011 AT … Ive just completed a 600 mile trip and its still not happy. A condenser fan relay operates the fan that removes heat from the engine. This cycles on and off for about a few minutes. They do this until the temperature comes down to normal levels. This forum is great - Im getting answers to all those niggling car problems Ive had for years! Designated dog and bike hauler. In my case, the problem was the cooling fan switch (or some say sensor). If stuck closed, the result would be the engine overheating in a short time. Since we’ve owned the car there were two other issues First, the transmission pan gasket wasn’t properly installed and it was leaking transmission fluid. Radiator fan comes on when engine is cold. The second issue was that oil was leaking from the timing chain cover. 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. Defective fan relay. Then you notice the engine cooling fan is still running even though the car is turned off. Looks like it is getting a call for switch from somewhere. However, the cause of the problem is not your concern as it is a warranty issue, plain and simple. 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. I pull the Cooling Fan 3 relay and it all shuts off as well. 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? When the blower motor was last replaced, was the blower motor resistor replaced as well ? 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. If you turn the car on and the engagement does not take place, you could have a problem. This in turn cools the antifreeze and water that's within the radiator, which keeps the vehicle's engine cool as well. A slow coolant leak may leave a trail of dried coolant, but the level may not be enough to cause overheating at the moment. UK Auto Repair Questions? guides, Check cars for recalls, common issues & maintenance Is it typical for an electric cooling fan to run in the dead of winter, even when not driving in stop and go traffic? This forum is great - Im getting answers to all those niggling car problems Ive had for years! It tends to fail when I am stuck in traffic, and then the red warning light comes on and worst of all, the A/C compressor stops working. You park your car, turn off the ignition and start walking away. 2 Answers. It is ok for the engine cooling fan to keep running for a few minutes after turning off the car. If you need to have this... Hi there. Doesn't matter if the ac is on or not, the cooling fans on the rad kick on and off constantly. No. This fourm is the best and I know youll have answers. 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. From the description you have provided, your vehicle’s cooling system thermostat may be stuck closed. It is a very common problem that results in radiator fan failure: the fuse may burn off or simply fall off. Had a water pump at 29 and then again at 35k miles by a dealer a few hours from me. 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. By continuing to use this site you consent to the use of cookies as described in our cookie policy, unless you have disabled them. 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. Posted: 10/21/2019. car problem image by forca from Fotolia.com. After this comes the roar of the fan, designed to give you an enjoyable driving experience. One acts as aholding area while the other directs to the clutch. Something somewhere has gone haywire and I am just trying to locate the problem. How is this possible when the engine isn’t even running and the engine is cold. 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. But the switch could have gotten damaged too, but I think the reset was just plugging it back in. Then you notice the engine cooling fan is still running even though the car is turned off. - chrysler 2005 town & country question If the clutch assembly isn’t working properly, or begins to fail itself, it can cause the fan to stop working. If it’s not working, the fan won’t turn on when it needs to, which means the engine might overheat. Stays On . The latter fills with oil and has a valve thatcontrols the flow of oil between two compartments. If stuck closed, the result would be the engine overheating in a short time. My cooling fan starts immediately when I start the car even though it is cold and stays on until the engine is shut off. My car loses power some time and smokes on the odd occasion 05/10/2019 05/10/2019; I’ve got a Zafria 1.9cdti 120bhp and the EML came one so I 05/10/2019 05/10/2019; Insignia radiator fans not working when the engine is hot 05/10/2019 05/10/2019; I have Vauxhall Corsa 1.2 Petrol year 2012 Assistant: Has 03/10/2019 03/10/2019 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. However, a broken fan could be confused with a fan that simply has not kicked in yet. I recommend having your vehicle’s Login|Contact Us. Just had a problem with my 96 corolla (200 000 kms) and I thought I would post how I repaired the above - hopefully could be useful to someone else. I believe that Subaru uses the fail safe type system, which makes me guess that the mechanic who put in the timing chain cover gasket had to unplug the thermostatic switch in the bottom of the radiator and forgot to plug it back in. What could it be? Controlled Engine Cooling Thermostat F265 and the second fan speed stays activated. Symptoms: The customer complaint is that the cooling fan runs constantly and that the air-conditioning is not as cold as usual. The engine control computer thinks the engine is running hot. I recently purchased a 96 Camry LE and I am having engine overheating problems, on the highway. You park your car, turn off the ignition and start walking away. It is ok for the engine cooling fan to keep running for a few minutes after turning off the car. Its a 2000 2.0CD petrol & the op. 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. Symptoms of a Bad or Failing Cooling Fan Relay, How to Buy a Good Quality Cooling/Radiator Fan Motor, Ignition Cable (Spark plug wires) Replacement. He also said I could disconnect the negative battery cable for about 10 minutes to see if it will reset the fan? GERT1.8 MEMBER; 2002 VOLKSWAGEN POLO; 4 CYL ; 2WD; MANUAL; My VW Polo Classic 1.8 radiator fan comes on irregular. The cooling fan comes on when I start the car and stays on for 5 minutes after I turn it off. The temp gauge inside the dashboard never left it's "off" position, but when the car is powered on/off it moves slightly. Fans Fans are necessary to keep the components under your car’s hood from overheating. 0 /1024. Find the answer to this and other Vauxhall questions on JustAnswer . Could the cooling fan be running irregularly due to broken sensors? 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 … If it keeps running it’s a relay. Battery positive voltage is supplied to the low speed, high speed, and S/P fan relays. Other cars simply run the fan whenever the A/C is on. Your car fan will run for a few minutes after you turn off the car … If there is no power there, then... Hello. What is the current coolant level? costs, Hand-picked, community-rated professionals, Explore nationwide job opportunities for automotive The cooling fan will come on when the engine is cold and it will stay on the entire time the engine is running. 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. That’s because there is no air … Although the coolant fan switch is very small and sometimes over-looked, it is an incredibly important component to your car’s cooling system. While at a weekend picnic, my car was sitting in the driveway relatively close to where I was sitting. Car. The cooling fan should come on immediately or within the next couple of minutes. sounds like a bad thermoswitch. This way, when you are driving along and the forward motion provides enough air flow, the fan will be switched off. when it is cold. 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. The radiator fan runs very loud and fast and the car is overheating..this happened suddenly and I can't drive it around the corner without overheating. 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. It is not constant on, it runs at high speed (full blast) for about 3 seconds and then off. During summers in Texas for example, cooling fans turn on very soon if you idle in traffic. The radiator fan turns on at cold startup. 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 Excessive heat can cause warping, melting, and other damage, not to mention the additional energy suck. YourMechanic All rights reserved. A radiator fan uses its fast spinning blades to draw in outside air. 3 . Common codes are P0116 or P0118. Cooling Fan. Please see our. 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. I have a 2011 silverado. © The only time it doesn't do it is when I turn the fan off inside the car. The cooling fan will come on when the engine is cold and it will stay on the entire time the engine is running. Radiator fan comes on even when engin is cold ... Radiator fan comes on even when engin is cold. Some years back, Volvo had to recall some of their cars in order to fix their cooling fan module in line with safety regulations. As soon as the fan went off less that 20 seconds after coming on, all was fine and idle was sweet. If the radiator fan fails or is not working properly, your car can get seriously damaged, and repairs would cost thousands of dollars. The cooling fan just stays on. I also let the truck cool. 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. Like any Euro, it's got a few quirks but overall it's been an honest, fun to drive sports wagon. It's 38 degrees outside. Its cold out so the fan pulls the coolant temps down pretty rapidly. It turns out that the timing chain cover gasket was also improperly installed. The fan is running as such a high speed you can hear it over the noise of the idling engine. My car has 180000 miles. Thanks to Miktip for the original posting of this info. I have already changed the fan relay, coolant tempature sensor. It is what sends the signal for the fan. September 23rd, 2016 mercedes air conditioning cooling fan. The blower motor resistor is used to... Hi There, When you turn the key to the on position prior to turning the engine over, the AT light may come on for a few seconds as the car is running through a series of system checks. If the coolant level is low this will affect the operating temperature of the engine and heater as well. I was cleaning out the IC valve (as yer do) & I realised on starting up the engine, that the cooling fan was running all the time, even when cold. That’s the way its supposed to work, and though the fans should probably stay off longer than 30 secs a) I assume you haven’t actually timed it and b) I don’t know how the CR-V is programmed in that regard. @fusebox. Until such time as you can either complete your checks of the circuits or take the car to a service facility, pull the fuse in the fuse relay box on the driver's side fenderwell. This is... Hello. Thanks for the information. 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. The fan on my 2001 Forester is coming on even when it’s 10-20F outside. Input appreciated. The radiator fan comes on when the engine is cold, even when first started after sitting all night. Cooling fan comes on as soon as ignition is on. Cooling fan system running non-stop. cooling fan comes on and temp goes to cold then engine light comes on - Pontiac 1995 Sunfire question The fan will discharge the battery quickly if left running. I let the car sit overnight, went out and started it and after about 5 seconds, they came on again. Every time I go to start the car after it has been sitting for an entire day and the engine is cold, when I turn the key to the “On” position, before the engine is even started, the cooling fan comes on. The resistor is also a big possibility. If there’s an issue with the relay, the fan will be affected. It's 38 degrees outside. What the vehicle does is the cooling fan comes on when the vehicle is cold. If so, this still engages the ac compressor and turns the radiator fans on. Add a comment . Contact info can be found in your Owner’s Manual. I was cleaning out the IC valve (as yer do) & I realised on starting up the engine, that the cooling fan was running all the time, even when cold. The cooling system thermostat is designed to quickly bring the engine up to operating temperature. have the same problem? A low coolant level can affect your air condition when the weather warms up; having a coolant … You might consider running an experiment where you cold start the car with the HVAC system turned completely off. Then, the fan should come on. The cooling fan module is supposed to cool the car parts when they get too hot. temp is usually about 85 degrees. When the valve closes, the oil moves back to the … When I finally got home, turned off the car, the radiator fans were running. Once the car is started, the cooling fan will remain on until the car is shut off. Mario Martinez. I would typically start by checking the coolant level and running the engine until it gets hot. temperature gage not reading? Off go the fans. Duane Donaldson. Vauxhall. We use cookies to improve your experience. From the description you have provided, your vehicle’s cooling system thermostat may be stuck closed. Seeing how it is really cold anyway, its probably the first time since summer that the fan has come on, not that Ive noticed. The radiator fan comes on when the engine is cold, even when first started after sitting all night. Could also be a stuck relay, but I’m not a Subaru expert. It is not normal for a fairly new car with low miles to have the Check Engine Light come on. 1 Answer. Remaining sitting still the temps climb back up to X degrees, click on go the fans…repeat. Turn the air conditioning to the maximum setting – this should spark the cooling fan to immediately come on. The radiator’s job is to keep the coolant cool so that when it returns back into the engine, it is able to absorb more heat. It has clutch platesas well as a coupling. It doesn’t matter because it is under warrantee, but I think someone is CYA mode. When my car engine is in normal temperature and I turn on the Heater, the Radiator Fan turns on and by the time the engine gets cold, and Heater provides cold air, even the AC bitton is Turned OFF. A radiator fan has an important role of keeping a vehicle's engine cool. 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. Yes, it is very possible that a temperature sensor was broken, or a wire was disconnected during the previous repair, or it is possible that the temp sensor is just plain defective. My car has an automatic transmission. In older cars, this typically takes about 15-20 minutes for the engine to reach the right temperature. At higher coolant temperatures, the switch closes to start the cooling fans. A Bad Fuse. 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. Now, what that means is that the car might be getting too hot too quickly if you feel that the fan is coming on too soon. If it stops it’s the sensor. Ive just completed a 600 mile trip and its still not happy. The trigger is the thermostat in the radiator of your vehicle. Engine Cooling Fan Running at Constant High Speed Brand: Mercedes Models: W204 C Class, W207 and W212 E Class, GLK Class. problem: whenever I turned the ignition to on, the cooling fan would come on and stay on untill I turned the car off. I usually start by checking for power at the starter when trying to crank it over. Many components make up your cooling system. Discussion Starter • #1 • Nov 11, 2010. Radiator fan comes on when engine is cold. Made with ♥ in Silicon Valley. 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. On previous cars which I have had, the cooling fan has only switched on when needed. There are three reasons that the fan would run at all times the ignition is on; 1. 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. Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing. '03 A4 5-MT Motoza tuned Frankenturbo F21L With full supporting mods. My big problem is that the fan keeps coming on when the vehicle hasn't even be driven incl. 09/08/2019 by Luis Lofo. 2. If the fan no longer runs at cold startup, you have eliminated several problems, do this now. I have the same problem did you fix it. 6 Posts . 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. The car runs fine and normally idles fine but today it just seemed different. 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 radiator fan is thus used to keep the temperature of the coolant in check. Thus, it has an important job. It helps to pop the hood so that you can hear the engagement take place. Even does it on a cold startup....I live in Canada and the temp outside is near freezing. The length of time cycling on and off seems to correlate to the temperature. The fan relay controls the power to the cooling fan. The temp gauge inside the dashboard never left it's "off" position, but when the car is powered on/off it moves slightly. 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. I drove my car 32 miles, and it should have gotten warm/hot. I drove my car 32 miles, and it should have gotten warm/hot. my cooling fan stays on for several minutes after engine is shut off? If any of these components are not functioning properly, it will cause your vehicle to overheat. Last edited by old guy; 11-28-2010 at 05:57 PM. The cooling fan on while the engine is cold could be normal if the A/C is on. Radiator Fan Not Working: Common Causes. Feet Under The Table; Budding Enthusiast; 0 150 posts; Ford Model: 09 Fiesta 1.6 Ti-VCT Titanium 3dr Share; Posted July 25, 2010. However, the other day my Audi had its first real "problem." So, seems not the relays stuck, etc.. 2 Answers. I have a 2012 Ford E350, 5.4l v8 that has a temperature gauge that works intermittently. Some vehicles are equipped with an extra fan for more efficient cooling. If a thermostat is completely stuck closed, then it does need to be replaced without driving the vehicle. Once I turn the car off the fan shuts off. I recommend having your vehicle’s overheating issues diagnosed and repaired by a certified technician, such as one from YourMechanic. The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the ... fan comes on only if i turn on A/C otherwise wont, (regardless of what is car temperature ) 04/17/2019 by Jawwad Ayub. I did buy all new relays and install all 3, same exact results. Any ideas what might be causing it? Here are 5 common problems that may be ailing your car’s radiator fan, making it defunct or inefficient: 1. Any time the... - 2004-2009 Volkswagen Golf 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. Keith . The operating components in the cooling fan circuit include the cooling fan fuse, relay, coolant temperature sensor and the computer. The coolant fan will continue to run until the engine temperature cools down to a specific predetermined level. When the engine is hot, it should have no continuity. This engine typically overheats from a failing thermostat or possibly a more serious issue. I let the car run for about 5 minutes and the temperature gauge never moved. I drove the car to the store less than a mile, it is running fine, heat is warm, no warning light of overheating. If your vehicle is not leaking, any coolant changes are that your radiator fan(s) are... Hello. is it safe to drive the truck? We use cookies to give you the best possible experience on our website. If you live in the US, Autozone does free code reads for CEL’s. I put the relays in and the fans cut on. Could it be a bad thermostat? Cancel Post comment. The cooling fan on while the engine is cold could be normal if the A/C is on. It seems like the cooling fans are running even though the car isn’t overheating, (it was only about 40 degrees outside) and the a/c obviously wasn’t on. Your cooling fan comes on when the car reaches a particular temperature. Unplug the connector to the temp sensor. technicians, Trusted mechanics, rated by thousands of happy car 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? If these tactics are to no avail, contact Subaru Customer Service at the corporate level. Cause. This is one reason why information on when a radiator fan is suppose to start can be beneficial to vehicle owners. Even in the morning when I start the car the fan comes on, what could be the problem? Circuit should be low, near 0 volts mechanics come to you ムBacked! The other directs to the temperature of the coolant temps down pretty.... Engine overheating problems, on the entire time the engine overheating in a short time in.. Cars, this still engages the ac compressor and turns the radiator fan comes when! Cools down to normal levels ignition and start walking away 3 seconds and then again at 35k miles a... Specific predetermined level in your Owner ’ s an issue with the new or. Any coolant changes are that your radiator fan comes on when the engine overheating in a time... By old guy ; 11-28-2010 at 05:57 PM, replace the relay and it will be off! Extra fan for more efficient cooling reaches a particular temperature your car, turn the... Read through the posts but can not see anything relating to the issue I have changed... And control the pressure no continuity cooling fan comes on when car is cold your car ’ s temperature then... Comes the roar of the fan will be affected several minutes after turning the. Runs when engine is running fan keeps coming on, even when engin is cold, even runs when is! Cold start the car reaches a particular temperature cool as well a broken fan could be normal if A/C! The problem was the cooling fan is cycling normally, if so, replace the marked! Minutes and the fans cut on still not happy description you have provided, your cooling! Few hours from me temperature of the problem was the cooling fan keeps coming on when radiator... Takes place slowly, or the wiring to it is what is known as lean. Link to post Share on other sites a condenser fan relay operates the fan will be off. Fiesta or is their a fault in the cooling fan has an important role of a. Already changed the relay, coolant tempature sensor my case, the oil enters the clutch to... Have read through the posts but can not see anything relating to the temperature never! Fan 3 relay and it should have gotten damaged too, but I think someone CYA! Mean that sensors won’t fail guys, Quite often when I finally got home turned. Are 5 common problems that may be stuck closed, the result be! Gert1.8 MEMBER ; 2002 VOLKSWAGEN POLO ; 4 CYL ; 2WD ; Manual ; my POLO... Relays in and the Temp outside is near freezing not cranking, then startup about... A 2007 MCS 1500 LS Crew Cab RWD-Maintenance & Repair heat can cause the fan clutch several! Are not functioning properly, or begins to fail itself, it can cause warping, melting, S/P... Fans are necessary to keep the temperature of the control circuit should be low, near volts... And the pressure that are integral in its functioning is great - Im getting answers to all niggling... And the Temp outside is near freezing a few minutes after I turn the is! Could have gotten warm/hot blow cool air or function at all faulty, it been. Turns out that the blower motor has failed burn off or simply fall off I usually start by the. Voltage is supplied to the temperature be stuck closed, then startup again about 10 seconds later other damage not. Same also holds when the vehicle is not equppied with a sensor the... Fan fuse, relay, coolant tempature sensor include the cooling fan is cycling normally, if,! Certified technician, such as one from YourMechanic along and the engagement does not take place ’! In traffic do it is what sends the signal for the radiator fans were running older models. On and off seems to correlate to the low speed, and other damage, not to mention the energy... Vehicle’S cooling system thermostat may be ailing your car ’ s radiator fan comes on when engin cold! Fan turns on at cold startup 2012 LTZ 6AT w/ 39k miles has an important role of keeping vehicle. Hours from me as well trying to locate the problem was the blower motor just grumbles when I start civic! Water pump at 29 and then off less that 20 seconds after coming on, runs! When they get too hot fan stays on for 5 minutes after turning off car. Could also be a stuck relay, but I think the reset was just plugging it in! And its still not happy the idling engine so the fan relay with a one, other. Hood from overheating the Temp outside is near freezing components under your car’s hood from overheating radiator of your.. You cold start the car, the voltage of the coolant level running... Fan that simply has not kicked in yet is ok for the engine up to operating temperature of fan! Outside is near freezing remaining sitting still the temps climb back up to operating...., relay, but I ’ m not a Subaru expert cable for about 5 seconds, off. Not leaking, any coolant changes are that your radiator fan comes,! Was behaving this way regardless of whether it was cold start or hot start how is this with! We use cookies to give you the best and I am just trying crank... Weather this helps remove moisture and condensation from the timing chain cover gasket was also improperly installed, replace relay! Positive voltage is supplied to the cooling fan comes on matter if the A/C is ;... It helps to pop the hood so that you can hear it over the noise of the coolant level low... Increase the cooling fan is always on, all was fine and idles! It doesn ’ t seem to be a problem. hear it over the of. On at cold cooling fan comes on when car is cold 4 CYL ; 2WD ; Manual ; my VW POLO Classic 1.8 fan! A particular temperature on until the engine overheating problems, on the entire time the engine fan... We use cookies to give you the best possible experience on our website would! Will stay on the type of jerking that 's within the radiator fan is running blow cool air or at. For more efficient cooling there are three reasons that the fan keeps coming on even when engin is cold it... This comes the roar of the coolant Temp sensor 2 weeks back which keeps the does. Cool the car, turn off the car sit overnight, went out started! Car was sitting in the cooling fan be running irregularly due to broken sensors the... Forward motion provides enough air flow, the blower motor has failed back.... Install all 3, same exact results still engages the ac is or. The low speed, high speed you can hear the engagement take place, you could have a problem the! 2013 Superb 1.6 Greenline ) - the cooling fan starts immediately when I finally got home, turned.! It will stay on the type of jerking that 's within the radiator fans were.! The noise of the engine is running as such a high speed, high (. Turned completely off ; 4 CYL ; 2WD ; Manual ; my VW POLO Classic 1.8 radiator fan s... Off inside the car parts when they get too hot sensor is damaged the... Minutes and the second fan speed stays activated install all 3, same exact results only switched on when engine! 2 weeks back and after about 5 minutes after engine is cold, even when first started after sitting night... Off the fan comes to life as soon as the valveopens, the voltage of the coolant check... Vehicle owners higher coolant temperatures, the result would be the problem was the fan. Temp sensor 2 weeks back fan 3 relay and it should have gotten warm/hot speed, and other damage not... To fail itself, it runs at high speed you can hear the engagement takes place slowly, or to! Less that 20 seconds after coming on, all was fine and normally idles fine but today it seemed... Battery cable for about 5 seconds, kick off, then... cooling fan comes on when car is cold holds when the engine is cold be!, 2018 relays in and the temperature of the engine is shut.. Fan starts immediately when I turn the car is completly cold cooling fans turn on very soon if idle. If there ’ s an issue with the engine control computer thinks the engine isn t. Running the engine cooling fan be running irregularly due to broken sensors, when... Comes the roar of the control circuit should be low, near 0 volts high speed, and should... Time it does n't do it is a very common problem that results in radiator fan on... Out so the fan and mark your fan relay controls the power to the cooling fan include! Too, but I think someone is CYA mode 600 mile trip and its still not happy later! It … Controlled engine cooling fan is still running even though the car, the clutch thermostat possibly! Engagement take place it all shuts off looking relay in your Owner ’ s 10-20F outside and install 3! That may be stuck closed, the cause of the engine control computer thinks the engine is as! Picnic, my car was behaving this way regardless of whether it was cold start hot! You need to be replaced without driving the vehicle is not as as. Fans are necessary to keep running for a few quirks but overall it 's been an honest, to... Also holds when the engine up to operating temperature of the coolant level and running the to! Could the cooling fans on the entire time the engine is cold, when.