Q: Rattling sound from AC compressor.

asked by on January 07, 2016

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

What does hot air below the driver' feet indicate?

Hi there: If the heater is not on and the vents are blowing hot air, it's possibly caused by a malfunction of the heater motor relay or the heater core. What's most likely happening is that there is an electrical...

Vehicle not accelerating as it should

Hello. Thankfully the Check Engine Light came on. These issues are easier to diagnose when the engine's computer has already detected what systems are showing issues. The first step is going to be to get the vehicle scanned for diagnostic...

Flapping noise when braking

Hi there: It's highly possible that the source of your front end noise is a faulty or worn out wheel bearing. In most cases when the wheel bearings wear out, the noises are caused by lack of lubrication or metal-to-metal...

Related articles

How Long Does an AC Thermistor Last?
Your Your car’s air conditioning system is very complex, and made up of several essential parts. One of the most important is the AC thermistor. No AC system can operate without it, whether it’s the AC system in your car,...
How Long Does a Heater Bypass Tube Last?
In In order for the cooling system on your vehicle to work, you will have to make sure that all of its components are repair free. The thermostat that is on your vehicle helps to regulate the flow of coolant...
How Long Does an AC Belt Last?
Your Your AC belt connects the crankshaft of your car’s engine to the air conditioning unit, delivering cool air to you in hot weather, and also working to defrost your windows when the temperature drops. Depending on the type of...