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Cooling fan only comes on when i turn the a/c on then i turn the a/c off and it stays on for about a minute then goes off and won't come on again unless i turn the a/c back on. 1998 ford escort lx
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If the cooling fan stays running, it's possible that your cooling fan relay is stuck in the on position and is supplying constant power which is why it stays running. Swap the relay with a similar one in the fuse box to see if it goes off. If it does, replace the relay. If it doesn't, you may have a wiring issue or possibly a computer issue which is grounding the relay for constant per..
The most common cause of this problem is that the drivers seat heater grid is open or burned out. That is based on 25 years as a Ford dealer technician.
depending on the engine temperature the fan is supposed to remain on after you turn the engine off, until the engine reaches a preset cooler temperature. when it reaches cooler temperature usually within 5 minutes or so it should cut off... if you cut it off and it is running 30 minutes later.. then there is a problem with the fan relay or temperature sending unit.
Do you have an extended warranty ? Usually white smoke from the exhaust means the engine is burning coolant thru a blown head gasket or intake gasket. You should also be low on coolant in the radiator.
The fan running and staying on after the vehicle is shut off is sometimes normal to a point. Meaning that if an engine is to hot, low on coolant then the fan will come on and stay on to help cool the engine down after the vehicle has been shut off. But for it staying on for 20 minutes is not right either. I would wait and see if it happens again, if it does then I would have either a Mobile Mechanic or a shop look at the car to figure out why it is staying on.
the temp sensor for the fan is going bad assuming the car cools down after the fan comes on and stays cool intil the fan turns off again. replacing it should fix your problem.
I have a 2001 S60 and the thermo fans come on after nearly every trip for at least 5 minutes, I would check your coolant levels and certainly change the thermostat if the problem persists.
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