Fan problem

Discussion in 'Peterbilt Forum' started by Stoneytbrowning, Aug 18, 2022.

  1. Stoneytbrowning

    Stoneytbrowning Bobtail Member

    1
    0
    Aug 18, 2022
    0
    I have a 2005 379 and my fan stays locked in. At start up the fan cycles thru like normal, but as soon as you actually start driving it locks in. I have replaced the solenoid and the fan cycle switch.
     
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  3. 062

    062 Road Train Member

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    Oct 20, 2013
    0
    Most likely a sensor commanding it to be on. Need a laptop with software for whatever engine you have.
     
    baha Thanks this.
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