Last week when i turned the a/c on, it would blow slightly cool air for about 5 minutes and then the clutch would stop and never come back on until it cooled off. I checked and serviced the freon R-12 and the same thing happened. Today i evac'd the system and put R-12A in it. Now the clutch engages but it only blows hot air. The pressure is reading good, no bubbles in the sight glass, but only hot air comes out. I felt the tubes coming out of the compressor and both are hot. Can I assume the compressor is bad or would something else cause this?

Did you flush the system out ?

I think R-12A is a semi flammable name brand is Freeze-12 and reports have it you only add about 55-60% of the original charge or it will choke. Lines shouldn't get way too hot which indicates problems with charge amount - guess. What's the high side pressure?

T

IMO - Alternatives are not easy or dependable. 134a stinks but is predictable....
Tom Greenleaf - MetroWest Boston - USA
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http://www.autoacsystems.com/tomgreenleaf/