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No heat in Cab

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by das6195, Jan 22, 2019.

  1. Jan 22, 2019 #1
    das6195

    das6195 Bobtail Member

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    Jan 22, 2019
    0
    2013 KW680 no heat in cab, but heat blow in sleeper. I've check the hoses going into fire wall and they are warm. What else should I check?
     
    das6195, Jan 22, 2019
    das6195, Jan 22, 2019
    #1
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  3. Jan 22, 2019 #2
    McMahons Trucking

    McMahons Trucking Light Load Member

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    Jul 4, 2018
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    The valve that lets the water in.
     
    McMahons Trucking, Jan 22, 2019
    McMahons Trucking, Jan 22, 2019
    #2
    olddog_newtricks and Rideandrepair Thank this.
  4. Jan 31, 2019 #3
    das6195

    das6195 Bobtail Member

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    Jan 22, 2019
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    I have a PACCAR engine and I don not see any valve to let water in.
     
    das6195, Jan 31, 2019
    das6195, Jan 31, 2019
    #3
  5. Jan 31, 2019 #4
    xsetra

    xsetra Road Train Member

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    Aug 21, 2011
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    Is your heater/defroster blowing air?Does the fan speed work?

    As said above, if your fan works, check your coolant hoses from radiator and from motor.


    Most trucks have two hoses going to each heater. I have a freighliner. Supply and return to the bunk heater, same for your dash heater.

    My valves are just single lever handles that turn 90°, not handles like on a water faucet for a hose on your house.

    Make sure all 4 are turned on. Usually when the handle is parallel with the hose, it's turned on.

    Good luck
     
    xsetra, Jan 31, 2019
    xsetra, Jan 31, 2019
    #4
  7. Jan 31, 2019 #5
    A gear per tire

    A gear per tire Bobtail Member

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    Jan 26, 2019
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    It could also be an actuator that changes from cold to heat not working when switching. Have you heard a clicking noise from inside the dash at all?
     
    A gear per tire, Jan 31, 2019
    A gear per tire, Jan 31, 2019
    #5
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