air conditioner squealing on 2000 Mitsubishi Montero Sport

My air conditioner has started to produce a loud squealing noise when turned on. Running the fan alone does not cause the noise. What's the cause?

by in Chesapeake, VA on July 16, 2009
3 answers 1 comment
ANSWER by on July 16, 2009
It likely to be related to the AC drive belt. That would be the first thing to check. An old belt can produce a squealing noise.
2 people like thisFlag inappropiateReply
ANSWER by on July 16, 2009
Could be something as simple as the a/c belt out of adjustment. Worst case scenario probably would be the a/c compressor clutch or the compressor itself going bad, which is somewhat common on these.
3 people like thisFlag inappropiateReply
ANSWER by on May 17, 2010
For anyome with this problem per mechanic 9 timrs out of ten eithet new belt or just needs to be tightened. My Mitsubishi montero sport was doing the same exact thing until Saturday. .took it to shop it was a horrible squeal. .the air belt was loose cost me $15.00 ...good luck.
7 people like thisFlag inappropiate
COMMENT by on August 16, 2010
is there another way you can fix the belt from the top