AC CLUTCH NOT ENGAGING

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by thecubantrucker, May 27, 2020.

  1. thecubantrucker

    thecubantrucker Light Load Member

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    Jun 2, 2019
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    good morning guys so I'm driving and it's hot in Nevada so about 1 month ago I had the compressor dryer both expansion valves both high and low switches replaced ac blowing cold. starting 2 says ago I noticed my ac worked for a bit then started blowing hot and compressor turned off when I hit a bump it turned on but it stopped all together. I checked for 12v power on the compressor and I tried jumping low pressure switch and nothing doesnt engage theres also power on the switch I read about 12v with multimeter any help suggestu0bs would be appreciated it
     
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  3. thecubantrucker

    thecubantrucker Light Load Member

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    oh and it is a 2002 freightliner century
     
  4. BoxCarKidd

    BoxCarKidd Road Train Member

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    I worked on one of those for a week and found the blower motor caused the compressor to cut off.
    Yes that sounds odd and may not be your problem.
    If you want to change out the breaker panel first I will make you a deal. Only been hooked up one time.
    Have seen bad connectors at the pressure switches on those and thermostat problems.
     
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  5. Chubby Fly

    Chubby Fly Medium Load Member

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    Anything is possible but simplistic things first, check your pressure. Obviously you probably don’t have the proper gauge manifold but one of those cheap gauges at autozone should be sufficient enough to at least see if there is any refridgerant left. There’s a possibility you sprang a leak somewhere and no refridgerant left in your system at all
     
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  6. pavrom

    pavrom Road Train Member

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  7. BoxCarKidd

    BoxCarKidd Road Train Member

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    power on what switch? If you put power to the clutch does it come on?
     
  8. Rideandrepair

    Rideandrepair Road Train Member

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    Check the connection at the temp probe, that goes into the evaporator, if it’s unplugged or loose, may be the problem. Mine would come unplugged, and compressor shut off. Sounds like you have a loose plug, ground, or broken wire, somewhere.
     
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