Q: Radiator fans not working and car overheats while idle

asked by on

Replaced the radiator fan assembly but they still won't spin. It over heats when it's at an idle. Please help!

My car has 167000 miles.
My car has an automatic transmission.

The radiator fans have three different relays in the relay box in the engine compartment and they are all controlled by the Engine Control Module (ECM). The system has a low and high speed fan that is controlled by the ECM. If you have the system scanned with the correct device you can turn the fans on and off from the ECM to check if the entire circuit is okay or not.

I would suggest getting some help from a certified technician, such as one from YourMechanic, who has the necessary tools to properly diagnose your overheating issue. From there you will know exactly what needs to be repaired.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Radiator fans not working and car overheats while idle

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: The best spark plug for Chevy Blazer

The best thing really--those things were designed for ACDelco plugs they came with. And if it didn’t come with the Radian spark plugs, buy the AC or Radian, because they last longest. Since spark plugs were designed for an engine,...

Q: Transmission slips when cold but shifts perfect when at operating temperature.

Your transmission may have defective pressure and control solenoids or could have bad seals inside the transmission. Either way you will need to have a qualified transmission mechanic run a diagnostic check to see if you are having internal leakage...

Q: Fluid leak from power steering reservoir

Hello! The most common leak on a Nissan, especially the 3.5, is the power steering hose between the pump and the power steering rack. In order to access this hose, the panels below the cowl and wiper must be removed....

Related articles

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...
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.