need help...'03 H2 with AC problems

[mdoyle]

Just about every compressor with any miles will show signs of leakage around the front seal, that doesn't mean it's totally dead.

One thing to keep in mind whenever you change out a serpentine belt is to replace the tensioner at the same time. Over time the old belt will change in size as it wears and the old tensioner will develop a set (sticking) point.

Now if you put a new belt on an old tensioner, the tensioner load position changes and it often won't fully tension the new belt resulting in slippage under load, belt squeal, and quick failure.

The first thing I'd do is replace the tensioner and give it another try as long as the new belt isn't damaged. Then if your A/C still doesn't work, go with the repair of that system.

[CBR_Raven]

Originally Posted by mdoyle

Just about every compressor with any miles will show signs of leakage around the front seal, that doesn't mean it's totally dead.

One thing to keep in mind whenever you change out a serpentine belt is to replace the tensioner at the same time. Over time the old belt will change in size as it wears and the old tensioner will develop a set (sticking) point.

Now if you put a new belt on an old tensioner, the tensioner load position changes and it often won't fully tension the new belt resulting in slippage under load, belt squeal, and quick failure.

The first thing I'd do is replace the tensioner and give it another try as long as the new belt isn't damaged. Then if your A/C still doesn't work, go with the repair of that system.

hmmm...that's interesting. i might try that before i have the new compressor installed. i already picked up a new tensioner from the dealer and i plan on gettting a new belt also before i install the tensioner. however, i will still have the new compressor if that doesn't work out.

[Planohummer]

the '03 and '04 model trucks have a low-pressure cycle switch with a nasty habit of over-cycling the compressor and causing it to shell. If your switch has a brown band on it it's the old style. Switch is on the line at receiver(aluminum 'jar' pass side firewall). compressor is most likely shot, tensioner most likely has limiting tab cracked off--look for 1/4 " tab that should set a movement limit on the tensioner arm.

[CBR_Raven]

well, i got the new AC compressor, belt tensioner and new belts installed today...so far so good. the AC blows like the truck is brand new