Ac Cluch not engaging

Discussion in 'Volvo Forum' started by 1source, Jul 18, 2014.

  1. snowwy

    snowwy Road Train Member

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    Jul 6, 2009
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    the a/c is designed to come on wth defrost. don't know what year they started. could be since the beginning of a/c. i don't know. but my 72 olds came on. but that's a car.

    check for power at the low pressure switch. if you got power, stick a paper clip in the plug and see if it sends power to the compressor. if it does then you've got a bad low pressure switch.

    do the same thing for the high pressure switch also.

    if you got no power, then it could be a relay problem or maybe ecm. in which case you'll be better off having a shop look at it.
     
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