a/c is acting wierd.. please help

[curt03]

i have a e99 f350 and my ac starting doing this thing where it wont turn on sometimes and sometimes it will. it usually does more often after ive been driving for a little while then try to turn it on... it just started doing it and i need help... i hate this fl heat

[roary]

Sounds like it's an issue with the A/C compressor clutch. One of the most common things is for the air gap to be a little large between the clutch and the pulley. I don't know what the gap is supposed to be on the clutch but it's not very much.

OR it could be that the compressor is about to go out. I just had my 03 6.0 compressor go a month after I removed one of the shims because the air gap was too large. I don't think it was because I removed the shim, but rather it was just time to go. It seized so hard that it didn't want to let the engine turn over fast enough to start it. Finally spun it long enough that the engine caught and I was able to drive it 250yds to my office when the belt broke just as I shut the engine down. Not fun.

[SWIFTSERVICE]

either you compressor cltuch is going out or compressor is locking up ,if you pop the hood turn the a/c on high and look to see if the cltuch is slippin,but could be the compessor locking up too,eather cltuck or compressor,you will still have to buy the who thing,just a cltuch kit cost 149.99.new compressor is around 200.00 and comes with a new cltuch on it,reguardless come out better buying the whole thing.

[Eric]

Also, check the high pressure switch. Mine was doing the same thing. Spent a crap load of money replacing the compressor and it ended up being a $10 switch

[jesilvas]

Already mentioned but mine was the air gap. Too many hours of AC running in Texas and it finally wore the clutches down so much they needed to be moved closer together. Great still.

[curt03]

alright thanks guys ill check it out and let you guys know what it was