what would cause cooling fans to come on when engine hasnt been run or even started ignition off with key out? 2007 A4
1 Answer
if the fan turns on and nothing is running or hot it means there is an issue with the ecu or a sensor or even the fans control modual. when the fan spins up on the german cars its cause it has no info from the ecu to tell it what to do. so it thinks life is on fire and spins up to max speed. this will likely require a mechanic to do and likely one who can reflash the ecu. the fan computer can also possibly be bad so thats always a chancy item as well. have it probley looked at but don't allow them to willy nilly throw parts at it unless they are 100% sure that it is the faulty part.