Thermo king APU A/C

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Martineztrucker, May 30, 2020.

  1. Martineztrucker

    Martineztrucker Bobtail Member

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    May 30, 2020
    0
    My apu compressor kicks on and then it starts to slow down like it’s building up to much pressure I replaced the compressor and dryer and expansion valve then vacuumed the system and recharged it and it did the same thing
    Any one have an idea what it could be
     
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  3. BoxCarKidd

    BoxCarKidd Road Train Member

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    Aug 26, 2014
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    If the pressure got to high does it not have a cut out switch?
    Could it be a fuel or other power problem with the engine?
    What are the high and low readings on the gauges?
     
  4. rtyauch301

    rtyauch301 Bobtail Member

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    Mar 29, 2011
    Athens, Alabama
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    do you mean the engine rpm drops if so mine did that the lift pump failed on the apu and it couldn't get enough fuel to properly run under a load
     
  5. Martineztrucker

    Martineztrucker Bobtail Member

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    May 30, 2020
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    It doesn’t cut off
     
  6. Martineztrucker

    Martineztrucker Bobtail Member

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    May 30, 2020
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    The engine works fine till the compressor kicks in 2 mins later it starts to slow the engine down
     
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  7. BoxCarKidd

    BoxCarKidd Road Train Member

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    What is the high side pressure?
     
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  8. Motto

    Motto Light Load Member

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    Apr 10, 2020
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    Your engine is not making enough power. Could be many things...
     
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