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Sleeper ac odd problem

Discussion in 'Peterbilt Forum' started by chainslingr, Jul 4, 2015.

  1. Jul 4, 2015 #1
    chainslingr

    chainslingr Bobtail Member

    31
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    Mar 24, 2015
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    So the sleeper ac lines tie into the main lines up on the firewall. I have ice cold ac in the front little to no ac in the sleeper. The blend door appears to be functioning. It's a 07 379. Any common issues or anyone run into this before?
     
    chainslingr, Jul 4, 2015
    chainslingr, Jul 4, 2015
    #1
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  3. Jul 4, 2015 #2
    Skate-Board

    Skate-Board Road Train Member

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    Aug 9, 2014
    Merrimack, NH
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    There may be a separate water valve under the hood for heat. Shut that off.
     
    Skate-Board, Jul 4, 2015
    Skate-Board, Jul 4, 2015
    #2
  4. Jul 4, 2015 #3
    chainslingr

    chainslingr Bobtail Member

    31
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    Mar 24, 2015
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    I've got all the water valves of that was the first thing I did. There's no heat now. But there's no cold air either
     
    chainslingr, Jul 4, 2015
    chainslingr, Jul 4, 2015
    #3
  5. Jul 4, 2015 #4
    Skate-Board

    Skate-Board Road Train Member

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    Merrimack, NH
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    Sounds like the solenoid in the sleeper is not working. They both use the same refrigerant. It's not a separate system.
     
    Skate-Board, Jul 4, 2015
    Skate-Board, Jul 4, 2015
    #4
  7. Jul 4, 2015 #5
    xsetra

    xsetra Road Train Member

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    Is your fan coming on in the bunk. Check air flow with the heat, then ac.
     
    xsetra, Jul 4, 2015
    xsetra, Jul 4, 2015
    #5
  8. Jul 4, 2015 #6
    chainslingr

    chainslingr Bobtail Member

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    Mar 24, 2015
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    When the valves were open I had heat it's blowing just not cold and it'll flip flop sometimes. Sometimes it'll work in the sleeper but than it doesn't work in the cab
     
    chainslingr, Jul 4, 2015
    chainslingr, Jul 4, 2015
    #6
    ColumbiaBoB Thanks this.
  9. Jul 4, 2015 #7
    xsetra

    xsetra Road Train Member

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    What will work
    What will flip flop? Fan, ac, heat ?
     
    xsetra, Jul 4, 2015
    xsetra, Jul 4, 2015
    #7
  10. Jul 4, 2015 #8
    chainslingr

    chainslingr Bobtail Member

    31
    3
    Mar 24, 2015
    0
    The ac. The problem is strictly related to air temp. The vent temp is only cold in one place at a time . Which makes zero sense everything else works as designed.
     
    chainslingr, Jul 4, 2015
    chainslingr, Jul 4, 2015
    #8
  11. Jul 4, 2015 #9
    xsetra

    xsetra Road Train Member

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    Me thinks you have bad gremlins! I have no help for you. Bad switches/relays?
    Good Luck.
     
    xsetra, Jul 4, 2015
    xsetra, Jul 4, 2015
    #9
  12. Jul 4, 2015 #10
    purpleprime

    purpleprime Medium Load Member

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    May 30, 2013
    spickard, mo
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    By chance does your truck have a switch in the front to make the sleeper air temp match the front I ask because my FL does and it went bad causing all kinds of weird things to happen. Sometimes the heat and fan would just come on on their own other times you couldn't get any heat or air may be something to look at anyway
     
    purpleprime, Jul 4, 2015
    purpleprime, Jul 4, 2015
    #10
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