Buzzing and vibration from AC compressor

With the windows closed I can hardly hear mine. Does it blow cold air?

 

i think the noise and buzzing gets worse until they fail. nothing you can do unless you want to replace it prophylactically.

 

Without actually hearing it, it's hard to tell. I can hear mine too on 1 and 2 bars. I can feel mine vibrating too through the brake pedal. It has been like this from day one.

 

i can hear mine, and it's fairly loud outside the car. but not with the engine running.

 

Mine buzzes, but I don't feel any vibration. Since it is a variable speed compressor, the buzzing noise is louder at higher compressor speeds. I think the buzzing is normal.

 

Doesn't seem normal. I notice little or no difference in sound or vibration when I use the AC.

 

You will notice the variation in compressor speed, if you have normal hearing, when the weather is hot and it runs at high speed initially then tapers off to lower speed as the interior reaches the set temperature. This is a high speed electric compressor that gets louder with age like they do in other applications but is not a cause for concern. Just run it until it breaks.

 

When I first bought my car, I too thought it sounded weird and asked the dealer about it. I was told that is was normal and that there was nothing wrong with it. I use the A/C almost 365 days a year, and It is working fine.