Coolant fan runs constantly, cool, warm etc., why?

90

Asked by Apr 27, 2013 at 04:02 PM about the 2010 Chevrolet Cobalt LS

Question type: Maintenance & Repair

fan runs all the time

7 Answers

77,735

Will it run with the key off? If it will then the relay is stuck closed, if it shuts off with the key then the fan sensor is defective. Or someone hooked it up to power source that turns on with the key.

4 out of 4 people think this is helpful.
90

tennisshoes I tow this car and ALWAYS remove the fuse that unlocks the steering wheel, the key remains in ACC while towing. Would this have anything to do with "power source that turns on key"?

2 out of 2 people think this is helpful.
77,735

The ignition switch is what turns on all of the power for your car to run, if you have the switch in ACC position you are suppling power to all of the accessories ie radio, wipers, on some models the heater fan. I don't know why you have the key in the ACC position while towing. Have you tried disconnecting the battery, push the brake pedal at least 3 times then reconnect the battery and restart the car to see if that clears the problem?

90

Can you tell me where the FAN SENSOR is located?

7 out of 7 people think this is helpful.
77,735

It should be located next to the oil fill tube close to 2 pipes.

Best Answer
90

thanks, i'll check it out.

10

the relays on 07 to 2012 impala burn and short out the fans sometimes stay on or don't work at all the fuse block under the hood shorts out as well gm has a external relay harness as a fix

1 out of 1 people think this is helpful.

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