I noticed that the A/C on our 00 approaching 100K miles has a slight buzz when it's on. It can be heard on the inside and it's not very loud but I don't remember if it was always like that. Everything seems to be working fine just wanted to post as a precaution to see if it's a sign of parts to fail/be replaced soon.

 

Get a mechanics sthesescope (or a long screwdriver) and put it on the A/C and put your ear up to the screwdriver (which will amplify the sound eminating from the A/C)

If you hear a rattling noise, it could mean the A/C bearing are starting to go.

 

52K, used the A/C maybe ten times, no noises to report so far.

 

have it checked out, it could be a leaky o ring(which cost around 5 cents), dying compressor, undercharging system.

all of the above can lead to major failure and expensive fix.

have a pro checked out before too late.

 

buzz only in very high would be normal. but under just one bar. than not normal

might just be blower motor

 

try changing the pollen filter might be leaves or something in the blower motor

 

Check to see where the noise is coming from first, with the A/C on, open the hood and wait for the A/C Clutch to engage then rev the motor.