A.C. compressor problem

The pulley will spin freely, you have to put a wrench on the center bolt, then you’ll feel compressor effect. If replacing, always turn it by hand , with a wrench on center bolt, about 10 revolutions, before charging it up. To lube internal parts.

 

I would rule out low and high pressure switches, fuses,coil temp sensor, and anything else particular to your make of Truck. Compressors usually lock up, or leak, when bad. If it rotates, chances are it’s still good, as long as front seal behind clutch isn’t leaking.

 

what did the gauges say

 

You have a leak, All that you tested for is no good without a/c gauges and a leak ck without a full charge of freon in system comp. will spin easy

 

I don’t think your going to hear any noise, with lines hooked up. Normally center bolt, and center of clutch Will be stationary, while outer pulls spins in idler mode. Once clutch engages it all spins together, thus turning the compressor.Maybe the clutch is locked up. We could guess at all day, a little more info on original symptoms, might help. Did it just quit? Does it run at all. Have you had it vacuumed down and properly filled, when you replaced the o rings? Why did you clean lines? That’s only required after a failure. If it’s not working at all, and you have switches on the air drier, maybe one is bad. Sometimes you can unplug them and jump the plug with a paper clip. To check switches. Be careful, as I’ve heard doing so can damage the newer systems. Supposedly. I’ve done it plenty, to test a low pressure switch, even ran for a week with it jumped.Dont leave HP switched jumped very long, as you’ll blow a hose or ?

 

Only time I had that problem was when expansion valve was plugged up, sticking, too much leak fix, lol. Replaced both of them, lines etc everything but the evaporators. I wish I would have done them also, as it’s impossible to flush them completely. same with condensors,Rail/ fin design not a closed loop.Sometimes you can get lucky flushing them ( expansion valves, or by hitting them, ( longshot ). Sometimes turning on and off, will free them up. Mine were bad, although when I took old ones out, they looked clean inside, like new. Little needle gets stuck, they’re toast. If there’s trash left anywhere in the system, usually evaporate or condensor, after flushing, they’re likely to plug up again. Same when replacing compressor, if not flushed ( at least the lines) good, new compressor won’t last long.