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'91 GMC Air conditioning problems.

12966 Views 8 Replies 6 Participants Last post by  danomt
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? it worthwhile to try to fix?...thx
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tried to bridge the low pressure switch, but no go...the compressor will not fire what?
You have to reset the control head by unplugging it or disconnecting the battery cable first, then you can jumper the connector to see if it will work.
Good Luck and God Bless
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