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2012 348 stuck in defrost mode

Discussion in 'Peterbilt Forum' started by WE INC, Feb 2, 2022.

  1. Feb 2, 2022 #1
    WE INC

    WE INC Bobtail Member

    4
    2
    Feb 2, 2022
    0
    I have a 2012 348 that is stuck in defrost mode. I changed the actuator, not sure it’s the correct one as the original was a 2 pin plug and the one I was sold is a 3 pin. Any suggestions would be helpful.
     
    WE INC, Feb 2, 2022
    WE INC, Feb 2, 2022
    #1
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  3. Feb 10, 2022 #2
    Jennyspete

    Jennyspete Light Load Member

    69
    45
    Apr 3, 2010
    ma
    0
    One of my trucks did that. Turned out to be one of the little doors that open and close to block the flow of air from one place to another, was broken and not moving. So no matter what I selected on the control, all I got was defrost. It was a small nightmare to tear it all apart to fix it.
     
    Jennyspete, Feb 10, 2022
    Jennyspete, Feb 10, 2022
    #2
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