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why is my epu not starting

Discussion in 'Ask An Owner Operator' started by Petpg123, Mar 20, 2023.

  1. Mar 20, 2023 #1
    Petpg123

    Petpg123 Bobtail Member

    34
    17
    May 8, 2017
    0
    epu was working fine and i had to replace the battery on the truck, after i did that the epu started acting up , the display freezes and wont cranck , everything works but wont cranck and i tried to jump start it with outside battery , it turns for a second and thats it.. but when i hook up the battery to the started from the outside , the display works fine , it has new starter and new alternator everything its perfectly fine
     
    Petpg123, Mar 20, 2023
    Petpg123, Mar 20, 2023
    #1
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  3. Mar 20, 2023 #2
    Just passing by

    Just passing by Road Train Member

    1,177
    3,140
    Feb 25, 2017
    Mississippi
    0
    I remember having trouble many moons ago. Had to reset it some how. I know I found a video on Youtube on how to do it. It worked. Sorry, that"s all I have...
     
    Just passing by, Mar 20, 2023
    Just passing by, Mar 20, 2023
    #2
  4. Mar 21, 2023 #3
    Siinman

    Siinman Road Train Member

    5,241
    13,265
    Mar 5, 2017
    Kansas City, MO.
    0
    May want to change your heading. EPU to APU and then you need to give everyone the model of what you have. More then one brand out on the market.
     
    Siinman, Mar 21, 2023
    Siinman, Mar 21, 2023
    #3
    Vampire Thanks this.
  5. Mar 21, 2023 #4
    Petpg123

    Petpg123 Bobtail Member

    34
    17
    May 8, 2017
    0
    My mistake , APU is thermo king tripac non evolution 270 older model
     
    Petpg123, Mar 21, 2023
    Petpg123, Mar 21, 2023
    #4
    Siinman Thanks this.
  7. Mar 23, 2023 #5
    RunningAces

    RunningAces Road Train Member

    1,277
    2,520
    Jul 2, 2017
    0
    When you take the top cover off the APU there is a big ### fuse near the back. I'd start by checking that.
     
    RunningAces, Mar 23, 2023
    RunningAces, Mar 23, 2023
    #5
  8. Mar 23, 2023 #6
    ‘Olhand

    ‘Olhand Cantankerous Crusty

    6,685
    16,230
    Jan 18, 2011
    0
    If it’s the combo with the espar heater...,there’s usually a reset button located on the heater box...it’ll trip off there’s a surge.. like a breaker
     
    ‘Olhand, Mar 23, 2023
    ‘Olhand, Mar 23, 2023
    #6
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