Skip the auto shop - Our mechanics make house calls

Q: Cooling fans won't turn on when engine hot

asked by on

My cooling fans work, but they don't turn on when the engine is hot. Is it a wiring problem?

A: Even though there are two fans, they work i...

Even though there are two fans, they work independently. One is called a radiator fan, one is the condenser fan for the AC. Each has each own relay. There are two temperature switches. There are 4 fuses involved. Both are controlled by a module so that is a good place to start. A qualified mechanic from YourMechanic can come out and diagnose your AC system to see what repairs are needed.

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・Save up to 30%

Get a quote

What others are asking

Q: I have a crack in my bumper. Do I need to replace the whole thing?

Assuming the crack is more than just a crack in the paint, I would say yes, and here is why. It will cost more money to repair the bumper than it will to simply replace it. There are many quality...

Q: At highway speeds, car loses power

I would check the fuel pressure (for being low) before doing anything else. If it is, check the fuel pressure regulator. (A clogged catalytic convertor would be a constant problem, not intermittent as you describe.) A professional mechanic, like one...

Q: RPM cable broken

Tachometers don't run on a cable, they run on an electrical signal. The signal usually comes from the crank sensor. The crank sensor gives the computer vital information to start the vehicle, such as when to deliver spark and fuel,...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...