Skip the auto shop - Our mechanics make house calls

Q: Squealing noise when A/C is turned on or off

asked by on

When I turn on the AC or defrost, there is a very high pitched sound. What should I do?

A: The noise you hear is the AC compressor bel...

The noise you hear is the AC compressor belt, most likely. The belt may be loose and just need adjustment, or it may be stretched and need to be replaced. Have a mechanic perform a diagnostic inspection, and replace the AC compressor belt if it is needed, or adjust it.

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: It was recommended that I was to get a fuel injector cleaning. Would getting the product from the auto store and putting in it my gas tank do the trick.

Hi there. Any solution will help clean out the fuel system. I recommend getting Sea Foam and putting the whole bottle in the fuel tank and fueling up the tank. This solution will remove all water in the fuel, debris...

Q: How do I use the maximum air conditioning?

The maximum air conditioning feature cools your vehicle at an even faster rate than the normal air conditioning. To turn on the maximum air conditioning, press the Max A/C button.

Q: Vehicle rumbling at low speeds

The rumbling at low speeds may be coming from a tire. The squealing noise at full turn is most likely a serpentine belt for your power steering pump that needs to be adjusted or replaced. The sagging rear suspension could...

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 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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...