It is temperature controlled, vehicles temp. actually rises when shut off, due to the coolant not being circulated.
If the coolant fan does not operate on a Chevy Corsica, it is likely that a fuse is out. There could also be a mechanical defect in the fan or wiring.
The coolant fan is triggered by a temperature sensitive switch. when coolant reaches a certain temp it turns the fan on. When the coolant drops below that temp it shuts off the fan. The ignition switch plays no part in the operation of the cooling fan.
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The coolant fan may have a blown fuse. The electric motor, on the coolant fan may be not working. The ground wire on the cooling fan may be corroded or loose.
To bleed the cooling system on a Mercedes-Benz S 500 after replacing the radiator and coolant, start by ensuring the heater is set to the maximum temperature and the fan is on low. Fill the coolant reservoir to the proper level, then start the engine and allow it to reach operating temperature while monitoring the coolant level. As the thermostat opens, air will escape, so periodically check and top off the coolant reservoir as necessary. Finally, once the engine cools, recheck the coolant level and add more if needed to ensure the system is fully bled.
cools the engine. without a fan, the car will overheat and the coolant will boil. the fan controls this from happening by cooling the coolant as it passes through the radiator.
The fan should turn off after the engine is shut off. If it stays on, the radiator fan relay has failed.
Why is the electric coolant fan in your 1989 Oldsmobile cutlass cierra not working?
Low coolant or an inoperative radiator fan.Low coolant or an inoperative radiator fan.
Coolant fan