Skip the auto shop - Our mechanics make house calls

Q: Cooling Fan

asked by on

Cooling fan cycles on and off when car is shut off and just sitting

My car has 70000 miles.
My car has an automatic transmission.

A: Hi, thanks for writing in. This is most lik...

Hi, thanks for writing in. This is most likely related to a faulty coolant fan switch. This is a relay switch that comes on when the temperature of the coolant system reaches a certain level. When this switch is faulty, it may cause the fans to come on intermittently or sometimes not at all or at the wrong times as you are experiencing. 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!

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: When I'm driving, sometimes the car over revs and jerks when I shift gears after the cars been on for a while

Hi There, What you are describing may be a result of a faulty speed sensor, potentially low transmission fluid or a even a faulty transmission control solenoid. As your vehicle travels down the road, the computer analyzes data being sent...

Q: loud hum coming from the front tires when driving on highway

Hello. The brake caliper hanging up can cause the noise you are hearing. If the caliper is causing the brake pads to drag, this will occur. It can also be caused by a bearing failing, which will cause the noise...

Q: Rough idle

Hi There, Code P0303 relates to an engine misfire in cylinder #3. Engine misfires can be caused by many different problems and are generally caused by either a spark or fuel issue or in some cases, a combination of both....

Related articles

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 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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...