tried to bridge the low pressure switch, but no go...the compressor will not fire over...now what?
'91 GMC Air conditioning problems.
My air has always worked well but the compressor always made what i call a groaning noise when it operated and I could hear this inside the truck. I have owned this truck since it was a year old. Once in a while the AC would flash on the heater control and I would disconnect the battery and reset and it would work again. Now the AC doesn't work at all and the AC flashes every time I start it up. Is this more than a recharge problem?...is it worthwhile to try to fix?...thx
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I noticed that the high pressure schrader valve was hissing slightly..fixed that, disconnected battery, jumped the low pressure, reconnected battery, started vehicle and set air to high and dumped a couple cans of super secret R-12 and I'm cold....thx everyone
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