No cab ac but bunk ac is working fine

Discussion in 'Peterbilt Forum' started by Txoutlaw73, Aug 6, 2016.

  1. Aug 6, 2016 #1
    Txoutlaw73

    Txoutlaw73 Bobtail Member

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    Aug 6, 2016
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    I have a 1999 379 peterbilt that just had a new ac compressor new condensor and all the sensors changed out .my problem is the cab ac blows warm air and the bunk blows cold as ice .all my water shut offs are off .can the temp control knob be the problem ?
     
    Txoutlaw73, Aug 6, 2016
    Txoutlaw73, Aug 6, 2016
    #1
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  3. Aug 7, 2016 #2
    Old school 362

    Old school 362 Medium Load Member

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    Mar 6, 2016
    Pensacola Fl
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    Check your heater core for warmth, shut off valves could be leaking even when shut off. And could also be very dirty .
     
    Old school 362, Aug 7, 2016
    Old school 362, Aug 7, 2016
    #2
  4. Aug 7, 2016 #3
    kitCat

    kitCat Light Load Member

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    Oct 13, 2013
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    I would say change your front expansion valve but its a 1999 so it might have a orifice tube instead. Get a new one put on and it'll blow cold as ice
     
    kitCat, Aug 7, 2016
    kitCat, Aug 7, 2016
    #3
  5. Aug 7, 2016 #4
    kitCat

    kitCat Light Load Member

    97
    38
    Oct 13, 2013
    0
    I would say change your front expansion valve but its a 1999 so it might have a orifice tube instead. Get a new one put on and it'll blow cold as ice
     
    kitCat, Aug 7, 2016
    kitCat, Aug 7, 2016
    #4
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