I 9400 INT CAB HEAT

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by BRGHTSD, Jan 2, 2018.

  1. BRGHTSD

    BRGHTSD Bobtail Member

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    Nov 2, 2017
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    Both systems have failed the back worked but stopped pushing heat out the vents in front to as well. If any one would help freezing my ### off thanks
     
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  3. BRGHTSD

    BRGHTSD Bobtail Member

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    Nov 2, 2017
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    Both systems turn on buttons work
     
  4. Steel Dragon

    Steel Dragon Road Train Member

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    Check your coolant level and block off the grill while parked to keep coolant temp up..I'm guessing your idling.
     
  5. BRGHTSD

    BRGHTSD Bobtail Member

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    Nov 2, 2017
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    I’m Idlin high with a cat c15 Idiling at 900-10 Temp at 180 Problem is when driving or stoped no heat comes threw the front just cold. The back was working but stopped throwing heat threw the vents
     
  6. BRGHTSD

    BRGHTSD Bobtail Member

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    Nov 2, 2017
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  7. BRGHTSD

    BRGHTSD Bobtail Member

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    Nov 2, 2017
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    Just need to know what’s parts needed to be replaced to get this working
     
  8. Steel Dragon

    Steel Dragon Road Train Member

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  9. Heavyd

    Heavyd Road Train Member

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    Cab and sleeper use the same heater core. If you loose heat on both, I would say the heater is plugged or coolant lines are plugged. Check for any shut off taps, and then feel the coolant lines to the heater core for heat.
     
  10. spsauerland

    spsauerland Road Train Member

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    Temp is controlled by blend door. Looks like passenger seat needs to come off for some inspection.
     
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