why is my epu not starting

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

  1. Petpg123

    Petpg123 Bobtail Member

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    May 8, 2017
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    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
     
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  3. Just passing by

    Just passing by Road Train Member

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    Feb 25, 2017
    Mississippi
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    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...
     
  4. Siinman

    Siinman Road Train Member

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    Mar 5, 2017
    Kansas City, MO.
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    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.
     
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  5. Petpg123

    Petpg123 Bobtail Member

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    May 8, 2017
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    My mistake , APU is thermo king tripac non evolution 270 older model
     
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  6. RunningAces

    RunningAces Road Train Member

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    Jul 2, 2017
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    When you take the top cover off the APU there is a big ### fuse near the back. I'd start by checking that.
     
  7. ‘Olhand

    ‘Olhand Cantankerous Crusty

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    Jan 18, 2011
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    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
     
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