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post #1 of (permalink) Old 06-18-2003, 09:11 PM
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A/C Woes

I recently bought a great running '91 S10, 4.3L, auto, A/C. The A/C (R-12) would quit blowing cold air after a few minutes, and seemed to be freezing over. If you shut it off for an hour or so it would blow cold air for a few minutes and then go back to hot air. So I took the plunge and converted to R134 this afternoon. An easy procedure, but as I stood there holding the can(engine running, A/C at max like the instructions said) I wondered why it was taking so long to empty the first can. Then I noticed that the compressor wasn't cycling. My 18 year old started fiddling around with the compressor, when he touched the clutch it suddenly cycled on. Scarred the sh** out of both of us but no harm was done. It quickly sucked the bottom out of the first can, and while I was changing cans the compressor cycled of. Got hooked up again and it didn't cycle back on for several minutes. This time he touched the clutch with a wrench (once bitten...) and it came on. After completing the 134A fill we let it run for awhile and noticed that when the compressor cycled of, it wouldn't restart unless you applied mild pressure to the clutch. Anybody got and idea what this could be? I checked the elec. connection on top, and pulled it down and cleaned and CRC'd it with no difference. Am I gonna have to rig up some kinda Rube Goldberg hammer so I can pull a string from the drivers seat and start the compressor?
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post #2 of (permalink) Old 06-19-2003, 03:24 PM
 
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Re: A/C Woes

</font><blockquote><font class="small">In reply to:</font><hr />

Am I gonna have to rig up some kinda Rube Goldberg hammer so I can pull a string from the drivers seat and start the compressor?


[/ QUOTE ]

Gawd, I wish this forum had mod points for funny, insightful whatever like on Slashdot.

Anyway, when you say touch, do you mean lightly or with percussivue maintenance?

When the clutch kicks in does it really bog down the motor? Sounds like there is something happening between either a vacuum line or a relay to tell it to cycle through (ie, engage the compressor clutch).
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post #3 of (permalink) Old 06-19-2003, 06:10 PM
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Re: A/C Woes

J.R.
It starts with a light touch and it's consistant, not just a coinsidence. One guy told me that the clutch was worn and I could possiblty tear it apart and remove a shim to tighten it back up. I think the hammer deal is easier.

BTW..I'm a J.R. too
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post #4 of (permalink) Old 06-20-2003, 11:07 PM
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Re: A/C Woes

a little hammer work in three places around the face of the clutch closed the gap a little and fixed the same prob for me .... the clutch closes with an electromagnet and closing the gap a little can make all the difference in the world
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post #5 of (permalink) Old 07-06-2003, 09:42 PM
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Re: A/C Woes

Just an update, tried the hammer (selected a #2 ball-peen) trick and it seems to be working just fine now for some two weeks...thanks again guys
post #6 of (permalink) Old 07-08-2003, 05:21 PM
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Re: A/C Woes

glad as heck to have been of service [img]images/graemlins/grin.gif[/img]
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