Carrier apu

Discussion in 'Ask An Owner Operator' started by Samandra, Nov 17, 2022.

  1. Samandra

    Samandra Bobtail Member

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    I got an carrier apu and getting ccu main brkr tripped 3544 fault code. I just did oil change and replace alternator and heat unit. It's working, charging batteries and keeping hot coolant but not blowing hot air. Only warm air and I can see heat unit not getting very hot
     
    Samandra, Nov 17, 2022
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