If it's a York compressor, it could be as simple as this!
I wonder how many owners have been charged for unnecessary work on their vehicle's air conditioner.
Experiencing an on again/off again situation with the cooling air coming into the car, I took it to my tame expert who, after checking that sufficient voltage was getting to the main body of the York compressor, quickly informed me that the trouble was more than likely to be found in the driven clutch.
He proceeded to remove the item in question only one bolt had to be undone and, sure enough, he was correct. After cleaning off the collected grime and re-installing the part, the air conditioner ran as it should.
It seems that, over time, grime buildup results in a drop in the voltage available to operate the clutch. Eventually, it fails to operate.
Naturally, this will always happen on the hottest day of the year.
The point is, the job took about 20 minutes and no parts were required.
See photo at http://i145.photobucket.com/albums/r240
Joined: Thu 19 Oct 2006, 11:10 00