What happens when your cooling fan relay is bad?
Cooling fans do not function If the relay fails, it will be unable to supply power to the fans, and as a result they will not operate. This can lead to overheating, especially when the vehicle is at a stop, where there is no forward motion by the vehicle to pass air over the radiator.
Can radiator fan cause overheating?
Your radiator fan pulls air across the radiator to help reduce the coolant’s temperature but a worn fan clutch or broken fan motor can’t help to reduce the temperature and will lead to overheating.
Why is my Toyota Camry overheating while driving?
If the cooling fan system fails, the car will often remain cool while moving but will usually begin to overheat when idling or in stop-and-go traffic. The electric fans should have a high and low speed function and should also operate when the air conditioner is switched on.
Why is my Camry 4 cyl fan always running?
That requires a vacuum pump and manifold gauge set. Short of that, it’s one connector and a wrench to remove the switch. I have a 2004 Camry 4 cyl with 106,000 miles. The fans are running whenever the A/C or defrost is turned on, even when engine is cold.
Can a bad thermostat cause a Toyota to overheat?
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. If the fan starts, the switch is bad and needs to be replaced. A symptom of a bad thermostat is an engine that overheats at highway speeds.
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.