Q: AC only blowing out hot air

asked by on

I hear a rattling/squealing noise when I turn the AC on. It goes away as soon as I turn the AC off. I hear this sound as long as the AC is on, whether I am in drive, reverse, or idling. It seems to be coming form the pulleys, I am not sure if it is a problem with the compressor, tensioner, or the belt. At one point, it shut down the engine.

Generally a bad tensioner will make noise at all times when the engine is running. If the noise only happens when the AC is turned on then the compressor is at fault. The use of an engine stethoscope can help in determining the source of the noise. You may want to enlist the help of a mechanic, such as one from YourMechanic, to assist in this repair as they will have the equipment to evacuate the AC system, replace the compressor, and refill the cooling system to ensure the AC system is operating correctly.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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. AC only blowing out hot air

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: Dashboard lighting and speedometer problems

It sounds like you are having a problem with your Totally Integrated Power Module (TIPM). This is essentially a smart fuse box that provides power to many different parts of your car. Your problem is common with many Chrysler vehicles....

Q: AC stops working when idling

It is possible that your compressor clutch is producing more drag than usual, causing the near stall at idle. When the engine RPM is raised, the belt rotates faster, forcing the compressor to spin. It is also possible that...

Q: new ac compressor now not energizing clutch

Hello. From what you describe, it sounds like there may be some sort of issue with the clutch pressure / cycling switch. These switches are responsible for activating the compressor when they detect that the pressure is at or temperature...

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...
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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...