Twiss

I’ll post once I figure it out. Thank you.

In that case it runs all the time, no matter what is turned off or on. It doesn’t produce cold air, and evidently locked at some point to melt the belt.

What looks like the clutch spins with the pulley AC on or off / HVAC powered off / set to heat (no defrost). I think I’ve confused myself more now.

IMG_5941.mov

This is NOT engaged…I don’t see a clutch remaining stationary? IMG_5941.mov

Can you post a 2 sec video? Doesn’t sound like the same compressor.

I appreciate the suggestion. Do you know anything about the clutch on these compressors? Typically the center of the pulley is clutch location and is stationary until it engages. Mine is not engaged, but the entire visible assembly spins freely??

I appreciate the suggestion. Do you know anything about the clutch on these compressors? Typically the center of the pulley is clutch location and is stationary until it engages. Mine is not engaged, but the entire visible assembly spins freely??

I’ll do the works (compressor/condenser/orifice tube/dryer/etc), but first I want to be sure it’s not something petty like a hi or low side switch. The only thing I noticed was the day before after hauling my boat for 4 hours there was some “smoke” from under the hood. Didn’t find leaks and it wasn’t obvious to be coolant or oil (however I didn’t think to look at the belt). I’m still trying to figure out how you know when the compressor is engaged, it’s not like any previous ac clutch I’ve seen. The entirety of the pulley is always rotating with the belt, whether the AC is off or on.

14SierraSLE5.3L Short hand summary. -Cold air quit, popped hood, ac belt shredded and melted. Melted to only a third of the compressor pulley, but 100% of the balancer (suspected compressor locked up). -Cleaned pulleys, replaced belt, compressor pulley spins freely (doesn’t have typical clutch that remains stationary when not engaged). No cold air -Pressure looked low (hard to say when you don’t know if the compressor is engaged), tried adding some 134, it took some from the can, then killed the motor. Suspect the compressor engaged and the drag from the belt stalled the motor. Before I replace compressor and the works, any suggestions on testing the system/compressor. The non visible clutch is really throwing me for a loop.