Skip the auto shop - Our mechanics make house calls

Q: Belt makes noise after turning on air conditioning

asked by on

I recently had the air conditioner compressor worked on. Since then, when I turned on the air conditioning, the belt makes a loud noise. When I turn the air conditioning on and leave the fan running, it stops.

Hi. If your vehicle is only making noise when you start the vehicle, it may be possible that there is a problem with the belt or one or more of the pulleys. I would recommend having a professional technician, such as one from YourMechanic, check the vehicle’s belts for proper tightness. If necessary, the mechanic can remove the belt and check the pulleys for excessive wear or binding.

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: Heater core malfunction

When the vehicle begins to overheat after cooling system repairs were done, it is usually due to air stuck in the cooling system. Normally after cooling system repairs, the coolant system is bled of all air, or "Burped". This is...

Q: Does the AC Use a Lot of Energy From the Engine?

Operating the A/C system definitely demands more energy from the engine and electrical system. Whether it’s a lot depends on how hot you are and how much you’d like to be cool! Seriously, it can require approximately 5 horsepower...

Q: I have to replace 2 rear wheel bearings, I already purchased as they are a warranty item.

Hi, thanks for writing in. If this is a factory warranty, the repairs will need to be performed by a dealership. They will supply the parts and labor for the repair. If this is a warranty supplied by the dealer...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...