Why does my car fan come on when the engine is not running?
Consult your vehicle repair manual to check the required sensors and switches. On a warm engine, the fan may come on even if the engine is not running. When working on a hot engine or an engine that is running, keep your hands and tools away from the fan blades and moving components.
Why does the radiator fan spin when the engine starts?
The fan belt is responsible for deriving power from the engine to transmit to the radiator fan. When the engine starts, the radiator fan starts spinning due to the power from the fan belt. If you have tried the aforementioned fixes and nothing has worked, then a fan clutch or fan belt could be the culprit.
What does it mean when a fan won’t turn?
This voltage phase difference is called “slip” and creates the torque in the motor. If there was no capacitor, the motor would not turn. If you want to check this capacitor, you can check it with a capacitance meter or use the ohms setting on your multimeter.
What to do if your a / C fan is not working?
The a/c button turns the fans on LOW only, and the fans will still work on high if the engine temperature gets too hot, above 107C actually, or 224F. The only way to fix this is to replace the defective fan.
This voltage phase difference is called “slip” and creates the torque in the motor. If there was no capacitor, the motor would not turn. If you want to check this capacitor, you can check it with a capacitance meter or use the ohms setting on your multimeter.
Why does my car fan turn on when it gets too hot?
The temperature sensor is responsible for turning on the cooling fan when the car gets too hot. Defective fan relay. The fan relay is what controls the power to the cooling fans so if there is an issue with it, the fan will be affected. A wiring issue.
Can a car fan still run after the engine is turned off?
Then you notice the engine cooling fan is still running even though the car is turned off. It is ok for the engine cooling fan to keep running for a few minutes after turning off the car. Your car fan will run for a few minutes after you turn off the car then turn off. This is normal in many vehicles, such as BMW or Mercedes-Benz.
Why is my radiator fan not working properly?
The fan clutch is the assembly that holds the radiator fan to the engine and makes it turn. If this burns out or fails, you’ll need to replace it. There are springs within the fan clutch that can wear out or corrode over the years. If everything else seems to be fine, the fan clutch is the most likely cause of radiator fan failure.
Consult your vehicle repair manual to check the required sensors and switches. On a warm engine, the fan may come on even if the engine is not running. When working on a hot engine or an engine that is running, keep your hands and tools away from the fan blades and moving components.
How to troubleshoot an electric cooling fan problem?
1.Has the Cooling Fan Actually Failed? 1 If the fan comes on when the AC is running at MAX, but doesn’t run when the engine is hot, check the temperature sensor… 2 If the fan fails to come on, first check for a fan blown fuse or triggered breaker. On older vehicle models, you may… More
When does the engine fan turn on in a Toyota Corolla?
The Radiator Cooling Fan Relay (8) energizes when both the Engine Main Relay (7) is energized and the Engine Cooling Fan switch (10) is closed. The Radiator Cooling Fan Relay Contact (8) is normally closed, so when the Radiator Cooling Fan Relay (8) is energized, its contact is open.
Why does the radiator fan have to start when turning?
The A/C condenser (the part which sits in front of the coolant radiator) is a heat exchanger. If air isn’t flowing over it, it won’t exchange the heat it needs get rid of so the A/C core inside the vehicle can become cold and make you comfortable. If the fan didn’t come on, you’d still be warm inside.
Why are my cooling fans running at all times?
3. 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 PCM not turn on the fans?
You are looking to see if the PCM sends power to one or both relays to turn on the coolant fans. This should happen as the high side of the system approaches 214 psi. If it exceeds this amount of pressure and the system doesn’t turn on, one of the sensors in the system that the PCM uses to know when to turn the system on and off has failed.
Can a bad fan motor cause a breaker to blow?
CAUTION: If the fan fuse or fusible link is blown, or the breaker has been triggered, it is possible the fan motor itself may be bad and causing the fuses to blow. Replace the fuse or fusible link, or reset the breaker, and test the fan motor again. If the same problem appears and there’s no wire causing a short circuit, replace the fan motor.