Q: Cooling fans running all of the time

asked by on

My cooling fans start immediately when I start the car, even on cold days, and stay on until I turn the engine off.

There are a couple possibilities. The engine’s computer controls the fans. If it does not have the proper input from the coolant temp sensor or other vital sensors, it can turn the fans on all the time by default. The Check Engine Light is most likely be on. The other most likely problem would be a faulty fan relay. It could be stuck on. The relay only has source power when the key is turned on. Either way, scanning the car’s computer would narrow down where to look for the culprit.

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. Cooling fans running all of the time

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: Engine runs, but car doesn't accelerate?

Knowing the results of the computer diagnosis as well as the part that was replaced can be helpful in assisting you with your Pontiac G3. It is possible the part that was replaced is defective and may need to be...

Q: Car dies after running for a while

This seems to be a fuel issue of some kind. With the new fuel pump it would be a good idea to replace the fuel filter if your vehicle has one. If that makes no difference it is possible that...

Q: Q: Cooling Fans

Most Vehicles now have 2 separate cooling fans. One cooling fan is intended to come on when the engine reaches a certain temperature. The other cooling fan is intended to come on when the air conditioning is turned on. When...

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 Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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.