View Full Version : Why do I keep burning up A/C clutches
plutopjf
06-25-2012, 09:19 PM
I have a 1972 Chevelle with factory A/C. I have burned up 5 A/C compressor clutches and can't figure it out. I have converted the POA valve to a update kit specifically for the 134A. I have installed a Pro6ten compressor (Burned two of them), changed the Expansion Valve. I just don't know that much about the A/C system to know what to look for. I don't really trust my car at any A/C shop. Does anyone have an idea for me?
shadowgray396
06-25-2012, 09:42 PM
Wish I knew more about AC, but this question is out of my area of expertise
Ms Grumpy
06-25-2012, 11:17 PM
Look in the motor forum. I think that there is a thread about air conditioning and the clutches.
plutopjf
06-26-2012, 11:41 PM
I never saw it.
Ms Grumpy
06-27-2012, 09:58 PM
OK..here is the link to when I had a question about replacing the fan clutch when I had my a/c installed. Brian states how there are 3 different clutches. That might be your problem, maybe you are using the wrong one. Check out the thread. Good Luck and I hope this helps.
http://chevelleforum.org/showthread.php?t=2778&highlight=conditioning+clutch
Hank70SS
06-29-2012, 08:25 AM
OK..here is the link to when I had a question about replacing the fan clutch when I had my a/c installed. Brian states how there are 3 different clutches. That might be your problem, maybe you are using the wrong one. Check out the thread. Good Luck and I hope this helps.
http://chevelleforum.org/showthread.php?t=2778&highlight=conditioning+clutch
That discussion was about cooling fan clutches, not AC clutches. The AC clutch is an electro-magnetic clutch. Only thing I can think of is voltage. Have you checked your alternator output voltage, especially at higher rpm? You may have a bad voltage regulator allowing the voltage to go to high and burn up the clutch. Voltage should be 14 to 14.5 volts.
plutopjf
08-15-2012, 03:37 PM
Thanks for the replys. I discovered I had a build up of compressor oil in the evaporator. I blew it out and now it works perfect.
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