2011 international 4400 heater only

Discussion in 'Trucks [ Eighteen Wheelers ]' started by truckerbangin, Aug 18, 2021.

  1. truckerbangin

    truckerbangin Light Load Member

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    Jan 22, 2013
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    got a 4400 durstar with mxforce dt. noticed truck would randomly cycle through the vent options with ac controller set to cold and max ac but would blow cold air. now it only goes on heater only no matter the ac controller settings, if i rest body controller it will blow cold air for 5-10 secs then goes to full on heater or tries to mix hot and cold air but mostly hot air.
     
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  3. Heavyd

    Heavyd Road Train Member

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    Feb 4, 2009
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    Probably have a blend door actuator jammed code getting logged in the body controller. The ac is controlled by the body controller which is the cab computer. Not much you can do without someone connecting Diamond Logic Builder software to it to see why it is doing that.
     
    spsauerland Thanks this.
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