379 pete sleeper heat and a/c problems

Discussion in 'Peterbilt Forum' started by coulds, Apr 24, 2013.

  1. coulds

    coulds Bobtail Member

    24
    0
    Nov 4, 2012
    Richmond,Va
    0
    Yes it works o all three speeds in the AC position but it doesn't i the heater position I was wondering if the switch is bad or is there a relay that is bad.
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. blade

    blade Heavy Load Member

    881
    647
    Jan 30, 2009
    Some where, Mo
    0
    You ever figure out the issue @coulds
     
  4. thejudges69

    thejudges69 Light Load Member

    249
    320
    Aug 22, 2015
    0
    Did you replace the pressure switch in the sleeper HVAC box? It's connected to the bottom of the expansion valve. It's got to have power to it. Make sure you have power to it and that's it's clicking on and off. It if doesn't come on it won't allow freon into the evap core. I'll post a pic when I get back to my truck.

    Are the freon lines getting cold at all?
     
  5. thejudges69

    thejudges69 Light Load Member

    249
    320
    Aug 22, 2015
    0
    Oh and there is a temperature rheostat the 379 sleeper. When you turn the temperature to cold or hot it will turn the blower motor on and off. The rheostat it part of the temperature control switch.
     
  6. Slowdust

    Slowdust Bobtail Member

    1
    0
    Sep 5, 2019
    0
    Where is the expansion valve location in 379 pete
     
  7. amberfeldt

    amberfeldt Light Load Member

    140
    150
    May 20, 2019
    Minnesota
    0
    Did you replace the switch in the control panel in the sleeper?if so how did you access it? did you only have to remove the storage compartment above the switch counsel ?
     
  8. thejudges69

    thejudges69 Light Load Member

    249
    320
    Aug 22, 2015
    0
    Depending on if you have a top bunk or not makes a difference.

    IF you have a top bunk then the controls are against the from cabinet facing down at the mattress, take the grey or tan cover off and you have full access.

    If you DON'T have a top bunk the part under the cabinets that's roughly 3' long comes off and you have full access to the controls that way as well. You shouldn't have to remove the cabinets at all..
     
  9. amberfeldt

    amberfeldt Light Load Member

    140
    150
    May 20, 2019
    Minnesota
    0
    Ok ill look it over some more thanks
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.