Skip the auto shop - Our mechanics make house calls

Q: Cooling fans

asked by on

My car has 2 fan spends hi and low... Only the low speed comes on and that's only if I turn the a/c on... I've changed relays fuses temp switch and thermostat... I bleed system burped it and flushed.... But the only way I can get the high fan to kick on is if I unplug the temp sensor which I replaced twice just in case the first one was faulty ... What could be the problem?????

My car has 145000 miles.
My car has an automatic transmission.

A: This can be caused by a number of things su...

This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning on and off at specific temperature thresholds. When this switch is not working properly, this can cause the fans to come on intermittently, all the time or sometimes not at all. When this happens you will notice a temperature spike and drop occasionally as the fan comes on and off. I would suggest having an expert from YourMechanic come to your home to diagnose your cooling system.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My car runs hot but it never overtheats the temperature gauge moves up and down

When you are driving on the highway above 45 mph your engine cooling fan does not provide any flow and the car relies on the force of moving air from the speed. The fan can still come on if needed...

Q: Vibration, but only at highway speeds.

Hello. This can be caused by a number of things. I usually start by checking the tire balance. If the balance is off, then this will occur. If the balance is fine, then I check the engine mounts and the...

Q: Car stopped running during use on the highway and won't restart.

Thanks for inquiring with YourMechanic. I believe your issue is going to be your alternator. The reason I am going this way is because your car isn't starting and it just stopped running on your on the highway. The reason...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.