Skip the auto shop - Our mechanics make house calls

Q: Unresponsive radiator fan

asked by on

My radiator fan is not coming on when my car reaches high temperature. I put power to the fan themselves and they spun. I also replaced the fuse, thermostat and fan switch. I did not test the new switch or thermostat to make sure the new ones work. But can a bad thermostat not cause the fans to turn on? If not, then I'm not sure what else I should do to try to fix the situation.

My car has 144000 miles.
My car has a manual transmission.

Hi, thanks for writing in. With the key in the on position, ground the black and green wire at the fan switch on the engine to see if the fan comes on. If it does, then I’d check the new fan switch to see if there’s a problem there. If it does not come on, then the problem may lie in the cooling fan relay in the engine fuse box. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as 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!
  1. Home
  2. Questions
  3. Unresponsive radiator fan

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: Advice on what makes of bullbars

Hello there, 1991 was the year that the Trooper was updated. This update changed the body style and dimensions. The answer would depend on what generation yours is, and the make of the bull bar. Some are made for specific...

Q: Car wont start. No crank, no response whrn key is turned? What do u suggest is the problem

Check to see if there are any stored diagnostic trouble codes. Be sure you have a fully charged battery that passes a load test. Confirm that the engine immobilizer system (security system) is not activated thus preventing the car from...

Q: My car air conditioner is making a rattling noise when I turn on the fan. I wanted to know what the problem is?

Hi, thanks for writing in. The rattling sound and the fact that you're not receiving cool air indicates a possible problem with the AC condenser fan. If you use your air conditioning when the AC condenser fan is not functioning,...

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 Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...