Why does my engine fan keep turning on and off?
It’s normal for some vehicles to have a fan run for a few minutes after the car is shut off, generally to keep the engine cool. However, if the fan is running for an extended period, the fan itself can become damaged due to overuse. It’s possible you may have a module or relay failing in your car.
How long should my engine fan stay on?
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 it off. This is normal in many vehicles, such as BMW or Mercedes-Benz. The radiator fan may run up to five minutes and sometimes longer.
Should the radiator fan always be running?
An electric fan SHOULD NOT run all the time. A mechanical fan WILL spin as long as the engine is running, but it will only ‘lock up’ when needed. Both radiator fans should always run when the coolant temperature sensor in the bottom tank of the radiator reaches about 212*F.
What are the symptoms of a faulty cooling fan switch?
Bad Cooling Fan Relay Symptoms
- The engine runs hot or overheats.
- The cooling fans don’t work.
- The cooling fans keep running.
- Warning lights.
- Poor air conditioning performance.
- Swapping Relays.
- Measuring the Relay Coil’s Resistance.
- Listening for Noises.
Why is my car fan not turning off?
Pull the cooling fan relay out of the box. Replace the cooling fan relay with a new one. A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off. The computer looses power with the key off and the same applies to the coolant temperature sensor.
Why is my engine fan always on?
It is possible that this problem of your car’s fans constantly running is some sort of mechanical or electrical error from a poor sensor or other component. There are temperature sensors and some cars have separate sensors for the gauge itself. The fan can be shut off when the engine temperature warrants.
Should radiator fan turn on when AC is on?
Both radiator fans should always run when the AC compressor is engaged. To check the temperature at which the fan comes on, turn the A/C off and keep the engine running until it reaches normal operating temperature. Most fans should come on when the coolant reaches about 200 to 230 degrees.
Why is my radiator fan not turning off?
How can you tell if a fan relay is bad?
One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. If you notice that your engine is running at higher temperatures than normal, that may be a sign that the relay is not functioning properly.
How do I know if my fan control module is bad?
Symptoms of a Bad or Failing AC Fan Control Module
- Cooling fans running for a long time. The cooling fans under the hood of your car are designed to keep the components of the system at a lower temperature.
- Cooling fans not running at all.
- Weakened air flow.
Can a car run on single cooling fan?
Yes, of course. But, the engine might get a little hot, and it isn’t a good idea to continue to do so without getting the other fan (or two) repaired or replaced… If there is more than one fan, there is a reason for it.
Why does the radiator fan turn on when the AC is on?
When your car AC is running it is taking heat from inside the cabin space and dumping it to the outside. So when you turn on the AC the condenser fan (radiator fan is for cooling the engine not AC!) turns on to transfer the heat absorbed from inside the cabin to the ambient air outside the car.
Is there a fuse for the cooling fan?
Where is the fuse for radiator fan? The cooling fan relay is normally located in either the underhood fuse and relay center or mounted to the electric fan assembly behind the radiator.
What causes a fan to stop working?
If your ceiling fan stopped working or is not turning on, it could be because it isn’t receiving any electricity. This could be because the circuit breaker has tripped or is off. Your ceiling fan could also stop working due to internal defects namely shot ball bearings or an overheated motor.
How do you test an engine cooling fan?
Unplug the fan connector closest to the fan. Make up some jumper cables. Then connect them directly, from the battery to the fan motor, to see if it spins. Consequently, if it does not spin it is blown.
What happens if a car fan stops working?
What happens if the cooling fan stops working? If your cooling fan stops working, your engine could overheat. This could cause damage to your engine parts. It’s a serious issue and needs to be looked at by a garage.
Should the radiator fan turn on when AC is on?
Where is the fuse for the engine cooling fan?
The cooling fan relay is normally located in either the underhood fuse and relay center or mounted to the electric fan assembly behind the radiator.
How can you tell if a fan fuse is blown?
You can tell if the fuse is blown because the fan will not even attempt to turn or make any noise. If you ‘fling’ the blades with your hand, still nothing (sometimes that starts them when they are sticking). But if the fan makes a noise like it is trying to start then it isnt the fuse.
How do you fix a box fan that stops working?
How do you fix a box fan that stops working?
- Check the Cord.
- Check Your Circuit Breaker.
- Check for Power to Your Outlet.
- Check the Fan Fuse.
- Replace the Cord.
- Clean the Fan.
- Grease the Motor.
- Call Customer Support.
