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AC compressor wont engage

Discussion in 'Volvo Forum' started by DUNE-T, Mar 18, 2020.

Page 1 of 3
  1. Mar 18, 2020 #1
    DUNE-T

    DUNE-T Road Train Member

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    AC Compressor only works for a few seconds after starting the truck, then shuts off. Thought it's a bad compressor, put a new one, nothing has changed.
    Freon is good, recharged, no leaks, everything is good, did it already like five times. Changed the Apad AC module, new temp sensor behind the fan blower, change high side ac sensor. Nothing helps.
    It's a 2003 Volvo with older style AC control in the cab.
    Where else can I look?
     
    DUNE-T, Mar 18, 2020
    DUNE-T, Mar 18, 2020
    #1
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  3. Mar 18, 2020 #2
    kemosabi49

    kemosabi49 Trucker Forum STAFF Staff Member

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    Low side pressure sensor is what kicks the compressor on.
     
    kemosabi49, Mar 18, 2020
    kemosabi49, Mar 18, 2020
    #2
    Socal Xpress and DUNE-T Thank this.
  4. Mar 18, 2020 #3
    Muddydog79

    Muddydog79 Heavy Load Member

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    Ive had to replace the pigtail that plugs into the pressure switch before, same issue.
     
    Muddydog79, Mar 18, 2020
    Muddydog79, Mar 18, 2020
    #3
    DUNE-T Thanks this.
  5. Mar 18, 2020 #4
    baha

    baha Road Train Member

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    CK all the plug in conn. on hi and low sensors for cancer on them from road spray?
     
    baha, Mar 18, 2020
    baha, Mar 18, 2020
    #4
    DUNE-T Thanks this.
  7. Mar 18, 2020 #5
    Mike250rs

    Mike250rs Heavy Load Member

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    check pigtail going to the a/c dryer. Had a few that have corroded out or just worked loose
     
    Mike250rs, Mar 18, 2020
    Mike250rs, Mar 18, 2020
    #5
    DUNE-T Thanks this.
  8. Mar 18, 2020 #6
    DUNE-T

    DUNE-T Road Train Member

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    Thank you everyone. Will update after replacing the AC pipe and installing new low switch.
    20200318_125138.jpg
     
    DUNE-T, Mar 18, 2020
    DUNE-T, Mar 18, 2020
    #6
    Muddydog79 Thanks this.
  9. Mar 19, 2020 #7
    Bold Group

    Bold Group Bobtail Member

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    Thank you, please update. Last week went to a shop and they replaced leaking AC sleeper lines, replaced filter dryer, expansion valve and heater core. Had AC for a week and it stopped working today.
     
    Bold Group, Mar 19, 2020
    Bold Group, Mar 19, 2020
    #7
  10. Mar 20, 2020 #8
    DUNE-T

    DUNE-T Road Train Member

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    Changed the low pressure sensor, compressor engaged for a minute, stopped, engaged and then stopped again. Does not want to work again.
    Gotta find an AC specialist I guess. The shop I did the repairs at, don't know what can be wrong
     
    DUNE-T, Mar 20, 2020
    DUNE-T, Mar 20, 2020
    #8
  11. Mar 20, 2020 #9
    spyder7723

    spyder7723 Road Train Member

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    You could always run a toggle to the power wire on the compressor. Not ideal cause you will have to manually cycle it on and off every 15 minutes or so, but will get you ac till you can narrow down the problem.
     
    spyder7723, Mar 20, 2020
    spyder7723, Mar 20, 2020
    #9
    DUNE-T Thanks this.
  12. Mar 20, 2020 #10
    062

    062 Road Train Member

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    Did you have a set of gauges hooked up? You might have a bit of a blockage. @QUALITYTRUCK @spsauerland may have some better ideas.
     
    062, Mar 20, 2020
    062, Mar 20, 2020
    #10
    DUNE-T Thanks this.
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