Question about 2002 Mitsubishi Montero Sport XLS

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Why ac compressor wont engage?

Only engage when relay IS jumped?

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Might also be low pressure switch is interrupting circuit.

Posted on Apr 29, 2015

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Bad relay

Posted on Apr 29, 2015

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A/c clutch wont engage. the compressor and clutch are good i jumped the pins on the pressure switch,didnt work. i checked the relay.i jumped the pins where the relay goes and got it to engage.


there are two pressure switches in an ac system
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the second is to prevent the compressor from running if there is insufficient gas
from what you describe , one of those switches ( most likely no gas) is the switch
check for oil dust around the fittings , condenser or have an ac specialist check for leaks and regas

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