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2000 379 ac freezing

Discussion in 'Peterbilt Forum' started by Loadx, Jun 11, 2021.

  1. Jun 11, 2021 #1
    Loadx

    Loadx Bobtail Member

    13
    10
    Jun 27, 2020
    0
    2000 Pete 379 daycab. Driver said the AC is freezing up on him during the day and blowing hot air.

    Can anyone give me guidance on what to look for and where it’s located in this truck, ie. thermostat or hose I need to look for etc. or any tricks to checking it out? I’m not too familiar with the ac side of these trucks.

    thanks a ton!
     
    Loadx, Jun 11, 2021
    Loadx, Jun 11, 2021
    #1
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  3. Jun 11, 2021 #2
    bad-luck

    bad-luck Road Train Member

    3,023
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    Nov 16, 2013
    Baltimore, Maryland
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    Possibly moisture in the system. You would need to evacuate to system, replace the ac dryer and put new freon in
     
    bad-luck, Jun 11, 2021
    bad-luck, Jun 11, 2021
    #2
    Klleetrucking Thanks this.
  4. Jun 11, 2021 #3
    cke

    cke Road Train Member

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    Aug 4, 2013
    Colfax Wi
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    Turn the fan speed up and don’t turn the temperature control knob all the way to the cold side. Turn the temp knob just a little to the right so the ac pump can kick off once in a while. Sounds like it’s freezing up.
     
    cke, Jun 11, 2021
    cke, Jun 11, 2021
    #3
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