See my profile. Recent Posts. It really sounds like your A/C clutch is freewheeling like it should when A/C is off.
(Defrost also engages A/C clutch, and may result in same squealing)
It sounds like when A/C Clutch engages A/C COMPRESSOR (A/C ON or DEFROST)The compressor locks up and either, that Pulley can no longer turn or is barely turning.
The engine strain is Horsepower. Trying to pull against.A Dead Pulley
The squealing is your belt, in the "BURNING MODE" thru the DEAD/ DYING pulley, and will soon FAIL, if you continue with current condition. No Belt. If you drove it too long. No water pump circulation. FRIED HEAD(S). STRANDED.$$$ REPAIRS $$$
This could be from TOO MUCH REFRIGERENT or your COMPRESSOR BEARINGS ETC. ARE BAD, or something else (I cannot see it from here!)
If you took it to a REPUTABLE shop, maybe it might have some sort of warranty, especially if its overcharged. You know, by the "NEW GUY". Especially if a Cell Phone was in the equation!
If you took it to JIMBOB---I saw Bob Vila do this once, you might be in trouble.
Defitely NO TAKEY BACK TO JIMBOB, He may have already displayed his know-how. WANT A DOUBLE-DIP?
Wednesday, April 14th, 2010 AT 9:55 PM