Skip the auto shop - Our mechanics make house calls

Q: Rattling sound from AC compressor.

asked by on

I hear a rattling noise from my AC compressor. It sounds like it is coming from the wheel. It turns and then it stops, and then it makes the noise.

The noise you hear may be the internal compressor problem with the swash plate and pistons if the noise you are hearing is when the compressor is engaged. If the noise you hear is when the compressor is not engaged, then it may be the pulley bearing is bad. Either way I would recommend you have a qualified mechanic to do a complete a/c inspection to see if the compressor is leaking or the failure cause. If it is the compressor then other components would need to be replaced with the compressor for a complete repair.

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: AC not blowing cold air

Low refrigerant is probably the most common reason why A/C systems stop working. A/C systems are closed systems, meaning the refrigerant is under pressure. This means that if the system is low, it is because you have a leak. Leaks...

Q: Grinding/ ticking / rattling noise from under front of car and heater not working.

Hi there. To pinpoint this issue I would definitely start by getting under the car to try and find the location of the noise. Most of the time this is caused by a failure in the air conditioning compressor but...

Q: Coolant leak and heater is not functioning

Hello. If your engine is leaking coolant then it is likely causing, at least partially, your heater malfunctions. The heater uses engine coolant to generate heat and if the engine is leaking or runs low the coolant may not reach...

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.