Air Conditioning noise after replacing the compressor?

2010 BUICK LA CROSSE
145,500 MILES • 3.6L • V6 • AUTOMATIC
Avatar
SUDHAMA GIBBONS
  • MEMBER
  • 5 POSTS
I just had my A/C compressor replaced and now when I am idle, I hear and feel a vibration coming from compressor. When I start to drive it goes away, and when I cut the air conditioning off it goes away. What could be wrong?
Aug 5, 2022 at 2:28 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

This could be a few things. First, something could simply be loose. Also, if the prior compressor wasn't working, you may notice it now.

The compressor places a heavy load on the engine. When you turn it on, the engine idle speed should increase a bit to compensate. When you turn it on, see if you notice the engine speed to slightly increase. Pay attention to the tachometer and let me know what the RPM's are when it's on.

Let me know.

Joe
Aug 5, 2022 at 9:23 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.