Skip the auto shop - Our mechanics make house calls

Q: Air not cool and car overheats

asked by on

The fans under the hood are not turning on, causing the air conditioner to not cool the car. It also overheats when idling. When driving on the highway, the air works fine and the car does not overheat. The fans are not locked up.

The cooling fans on your vehicle are controlled by your powertrain control module through the fan relay when your vehicle gets to a set temperature. You could be having a failure of the fan relay and module. If these two components are tested to be okay, and power is getting to the fan, you could have a bad fan motor. I recommend having a mechanic, such as one from YourMechanic, inspect your cooling system, and scan your module, for a proper diagnosis.

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
  1. Home
  2. Questions
  3. Air not cool and car overheats

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: Hot air coming out of vents

It sounds to me like your AC isn't kicking on. Usually this is caused by low refrigerant in the AC system or a leak. If you need help with repairs, have a certified mechanic, such as one from YourMechanic, come...

Q: my car wouldn't start and found out my battery was 5 years old so got a new battery. now having the same issue a couple days later

Hi Haley. Thanks for contacting us tonight. When a battery dies quickly, it is often caused by a malfunction of the battery charging system. The alternator is responsible for this task, but there are other parts like the battery temperature...

Q: My car is over heating and blowing cold air.

The heater not working in some cases may be related to the overheating problem you are also having. This may be due to a faulty heater blower motor or potentially a bad heater core. As you may know, the heater...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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...