Why is my radiator fan constantly running?
Cooling fans stay on at all times If the cooling fans are staying on at all times, this is another (less common) symptom of a possible problem with the cooling fan relay. If the relay shorts internally, it may cause power to be permanently switched on, which will cause the fans to run at all times.
Why does my engine fan keep coming on?
Engines operate at their most efficient when they’re hot but not too hot. The fan turns on when you’ve stopped driving because no more cooling air is flowing into the engine bay. This causes the temperature to rise, automatically triggering the fan.
When does the cooling fan come on on a Toyota?
The cooling fan is usually activated when the air is running at medium or high speed. The fan switch is bad – The fan switch comes on when the coolant is a set temperature. You can test the switch by disconnecting the wiring harness and using a jumper wire on the contacts.
How can I tell if my Toyota radiator fan is bad?
The fan motor is bad – You may have a bad fan motor. You can test this when you are at home by finding the radiator fan switch and disconnecting the wiring harness. Use a jumper wire and insert it into the two contacts. If your fan does not come on, the motor is bad. Another way to check the fan is to turn on the air conditioning in the car.
Where is the cooling fan switch on a Toyota Corolla?
91 people found this helpful. The cooling Fan switch in 98-2000 Corolla is located in the thermostat housing behind, and below the alternator on the passenger side. You will need to remove the alternator to get at it. It has a single wire. A sender in the engine water jacket with TWO wires is the temperature sender NOT the cooling fan switch.
How does the radiator cooling fan relay work?
The contact in the Radiator Cooling Fan Relay (8) is normally closed, so it closes when the relay drops out. This provides a current path to the Cooling Fan Motor (9) and the cooling fan operates.