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AC CLUTCH NOT ENGAGING

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

  1. May 27, 2020 #1
    thecubantrucker

    thecubantrucker Light Load Member

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    Jun 2, 2019
    0
    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
     
    thecubantrucker, May 27, 2020
    thecubantrucker, May 27, 2020
    #1
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  3. May 27, 2020 #2
    thecubantrucker

    thecubantrucker Light Load Member

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    Jun 2, 2019
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    oh and it is a 2002 freightliner century
     
    thecubantrucker, May 27, 2020
    thecubantrucker, May 27, 2020
    #2
  4. May 27, 2020 #3
    BoxCarKidd

    BoxCarKidd Road Train Member

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    Aug 26, 2014
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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.
     
    BoxCarKidd, May 27, 2020
    BoxCarKidd, May 27, 2020
    #3
    Muddydog79 and HopeOverMope Thank this.
  5. May 27, 2020 #4
    Chubby Fly

    Chubby Fly Medium Load Member

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    Nov 25, 2019
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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
     
    Chubby Fly, May 27, 2020
    Chubby Fly, May 27, 2020
    #4
    BoxCarKidd and jsnell Thank this.
  7. May 27, 2020 #5
    pavrom

    pavrom Road Train Member

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    Apr 29, 2012
    NE illinois
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    Low freon ?!
     
    pavrom, May 27, 2020
    pavrom, May 27, 2020
    #5
  8. May 28, 2020 #6
    BoxCarKidd

    BoxCarKidd Road Train Member

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    Aug 26, 2014
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    power on what switch? If you put power to the clutch does it come on?
     
    BoxCarKidd, May 28, 2020
    BoxCarKidd, May 28, 2020
    #6
  9. May 28, 2020 #7
    Rideandrepair

    Rideandrepair Road Train Member

    16,521
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    Aug 8, 2015
    0
    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.
     
    Rideandrepair, May 28, 2020
    Rideandrepair, May 28, 2020
    #7
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