Skip the auto shop - Our mechanics make house calls

Q: Dual cooling fans issue

asked by on

My car has dual radiator cooling fans and lately they aren't working correctly. If I turn the AC on, the fan on the driver's side doesn't work. The one on the passenger's side runs great though. Cooling fans are not working at all if the AC is off. I attempted to increase the temperature by idling longer so as to affect the fans and start them running. Neither of those would start running. I had all the fuses and connections checked. I lubricated the connections also, but it is still the same. How can I fix this?

The cooling fan motors should both come on together. The cooling fan controller will control the speeds of the fans with input from the engine control module. Your fans are controlled by the fan controller on the fan motors and both motors and controller need replaced to fix the problem. If you want to have this checked, a certified technician from YourMechanic can come to your location to inspect the AC system and help you move forward with repairs.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Possible injector issue?

Hi, thanks for writing in. A knock in a diesel engine usually indicates an injector issue. Either an injector is not working or the injector pump is not pumping on that cylinder. I recommend having a diesel-savvy technician check each...

Q: My 2010 Mercury Mariner makes a rattling sound when accelerating

The noise you are hearing is most commonly known as pinging or pre-ignition. This can be causes by the mass air flow sensor running the engine lean or if you do not have a flex fuel vehicle then running a...

Q: Car gets too hot before the fans come on.

This is a common sign of a faulty coolant temperature relay. This is a relay that monitors the temperature of the coolant and relays this information back to the computer which then uses this information to make many different decisions...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.