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AC Not Working

This is a discussion on AC Not Working within the General Help forums, part of the LSx Technical Help Section category; Blower fan runs, compressor isn't engaging though. No blown fuses, but I'm not sure how to check the relay. Guess ...

  1. #1
    Single Malt rbob93's Avatar
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    Question AC Not Working

    Blower fan runs, compressor isn't engaging though.
    No blown fuses, but I'm not sure how to check the relay.
    Guess I should let it cool down & check for power at the plug going into the compressor.
    Is there anything in the dash that needs looked at?

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    Senior Member mrr23's Avatar
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    maybe the freon is low? low pressure switch is bad? compressor clutch bad?

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    Single Malt rbob93's Avatar
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    Quote Originally Posted by mrr23 View Post
    maybe the freon is low? low pressure switch is bad? compressor clutch bad?
    The clutch doesn't engage.
    It spins freely when I spin it with my finger.
    Unplugged the wires at the compressor & fired the engine, turned the AC on inside & was reading 2 volts on my meter.
    Does that sound like a low pressure switch problem?
    Freon?? Would being low not make the compressor clutch kick in??
    Thanks for the reply.

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    the cake is a lie twozs's Avatar
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    the low pressure switch senses when the freon is low and shuts the system down. the evap coil could freeze and potentially slug liquid freon back to the compressor and damage the valves or pistons or such. its a safety device. you can try to jump it and see if the compressor starts (not my advice) which could at least isolate your problem

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