Discussion Starter • #1 • Mar 11, 2014. 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. Radiator fan comes on when engine is cold. The cooling fan should come on immediately or within the next couple of minutes. 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. Hi there: It really depends on the type of jerking that's occurring with your Chevrolet. Once the car is started, the cooling fan will remain on until the car is shut off. It helps to pop the hood so that you can hear the engagement take place. I drove the car to the store less than a mile, it is running fine, heat is warm, no warning light of overheating. The operating components in the cooling fan circuit include the cooling fan fuse, relay, coolant temperature sensor and the computer. 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. My car has an automatic transmission. Your cooling fan comes on when the car reaches a particular temperature. 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. Any time the... - 2004-2009 Volkswagen Golf © temp is usually about 85 degrees. The car was behaving this way regardless of whether it was cold start or hot start. technicians, Trusted mechanics, rated by thousands of happy car I have a 2011 silverado. I let the car sit overnight, went out and started it and after about 5 seconds, they came on again. I usually start by checking for power at the starter when trying to crank it over. Could it be a bad thermostat? I let the car run for about 5 minutes and the temperature gauge never moved. 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. However, that doesnât mean that sensors wonât fail. This too was fixed, and doesn’t seem to be a problem anymore. 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. The fan will discharge the battery quickly if left running. Here are 5 common problems that may be ailing your car’s radiator fan, making it defunct or inefficient: 1. 6 Posts . This is one reason why information on when a radiator fan is suppose to start can be beneficial to vehicle owners. 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? Probably a stuck temp sensor. Do you. I recommend having your vehicle’s You park your car, turn off the ignition and start walking away. If your vehicle is not leaking, any coolant changes are that your radiator fan(s) are... Hello. Your car fan will run for a few minutes after you turn off the car … As soon as the fan went off less that 20 seconds after coming on, all was fine and idle was sweet. 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. Quote ; Link to post Share on other sites. The fan is running as such a high speed you can hear it over the noise of the idling engine. 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. If there is no power there, then... Hello. 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. Some vehicles are equipped with an extra fan for more efficient cooling. Is your air conditioning turned … Duane Donaldson. Hi guys, Quite often when I switch my car off (2013 Superb 1.6 Greenline) - The cooling fan keeps on running. Is it typical for an electric cooling fan to run in the dead of winter, even when not driving in stop and go traffic? If these tactics are to no avail, contact Subaru Customer Service at the corporate level. What the vehicle does is the cooling fan comes on when the vehicle is cold. Over time, the clutch assembly will begin to wear and require servicing. 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. The radiator fan comes on when the engine is cold, even when first started after sitting all night. However, the cause of the problem is not your concern as it is a warranty issue, plain and simple. What causes cooling fans not to come on? If stuck closed, the result would be the engine overheating in a short time. 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. Ive just completed a 600 mile trip and its still not happy. Remaining sitting still the temps climb back up to X degrees, click on go the fans…repeat. It is not normal for a fairly new car with low miles to have the Check Engine Light come on. 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. If so, this still engages the ac compressor and turns the radiator fans on. The cooling fan module is supposed to cool the car parts when they get too hot. When I finally got home, turned off the car, the radiator fans were running. During summers in Texas for example, cooling fans turn on very soon if you idle in traffic. In older cars, this typically takes about 15-20 minutes for the engine to reach the right temperature. If any of these components are not functioning properly, it will cause your vehicle to overheat. Its a 2000 2.0CD petrol & the op. If the coolant level is low this will affect the operating temperature of the engine and heater as well. Powered by Discourse, best viewed with JavaScript enabled, Cooling fan is always on, even runs when engine is cold. 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. This problem of a slight jerk feel is what is known as a lean tip in surge. Cooling fan system running non-stop. The same also holds when the engagement takes place slowly, or the fan comes to life as soon as you start the car. Does anyone know what the problem could be? Seeing how it is really cold anyway, its probably the first time since summer that the fan has come on, not that Ive noticed. I have the same problem did you fix it. But the switch could have gotten damaged too, but I think the reset was just plugging it back in. If it’s not working, the fan won’t turn on when it needs to, which means the engine might overheat. Posted: 10/21/2019. 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. It should test for continuity when engine cold. It is what sends the signal for the fan. If a thermostat is completely stuck closed, then it does need to be replaced without driving the vehicle. I put the relays in and the fans cut on. Could the cooling fan be running irregularly due to broken sensors? By continuing to use this site you consent to the use of cookies as described in our cookie policy, unless you have disabled them. 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. guides, Check cars for recalls, common issues & maintenance A radiator fan is thus used to keep the temperature of the coolant in check. Last edited by old guy; 11-28-2010 at 05:57 PM. YourMechanic All rights reserved. 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 … When the valve closes, the oil moves back to the … The trigger is the thermostat in the radiator of your vehicle. 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. The cooling fan on while the engine is cold could be normal if the A/C is on. Then you notice the engine cooling fan is still running even though the car is turned off. A Bad Fuse. The cooling system thermostat is designed to quickly bring the engine up to operating temperature. If you turn the car on and the engagement does not take place, you could have a problem. If the radiator fan fails or is not working properly, your car can get seriously damaged, and repairs would cost thousands of dollars. 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