Skip the auto shop - Our mechanics make house calls

Q: My car fan runs on 2 speeds - can I replace the radiator fan resistor?

asked by on

At times radiator fan will come on high and then go to a lower speed or vice versa and will continue to run on high even after the car is turned off for a few minutes. But if I turn off the car when fan is running on low speed it will turn off with the ignition.

My car has 130000 miles.
My car has an automatic transmission.

Hello - I believe this is normal behavior, and handles cooling the engine down appropriately (i.e. fan speed changing based on how hot the engine was when running) upon shutdown. There are problem cases where the radiator fan runs on high speed all the time, and in some cases doesn’t shut off as it should. If you believe this behavior is incorrect, I would recommend having an electrical components are not working inspection completed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, provide a deeper diagnosis of this problem, give you an accurate assessment of damage and cost estimate for 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
  • Home
  • Questions
  • My car fan runs on 2 speeds - can I replace the radiator fan resistor?

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: Shifting issues during usual acceleration

Hey there, thanks for writing in about your 2009 Mercedes-Benz E550. Be sure to verify that your car is not in "Limp Mode," as this will likely create the same reaction for your car. Mercedes uses this as a safety feature...

Q: There is a wire at the bottom of the A/C fan that is not connected to anything. What is this wire?

I assume this is a wire with a connector on the end, if not, then a loose wire with out an end is part of a damaged harness. If this is the case, I will not be able to tell...

Q: Replaced parts cited as problem

Hi there. Many components make up your cooling system. If any of these components are not functioning properly, it will cause your vehicle to overheat. If your vehicle is not leaking any coolant, chances are that your radiator fan(s) are...

Related articles

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
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.