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2020 kenworth T800 no heat only a/c

Discussion in 'Kenworth Forum' started by septic truck, Oct 8, 2019.

  1. Oct 8, 2019 #1
    septic truck

    septic truck Bobtail Member

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    Oct 8, 2019
    0
    T800 Kenworth has no heat into cab. a/c comes on when temperature control is turned to the heat position.
     
    septic truck, Oct 8, 2019
    septic truck, Oct 8, 2019
    #1
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  3. Oct 8, 2019 #2
    Brandt

    Brandt Road Train Member

    4,071
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    Sep 17, 2012
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    It could be the valves for the coolant to the heater are closed. Not all truck have them but it used to be normal fall thing to open the valves
     
    Brandt, Oct 8, 2019
    Brandt, Oct 8, 2019
    #2
    snowwy, magoo68, OldeSkool and 1 other person Thank this.
  4. Oct 8, 2019 #3
    septic truck

    septic truck Bobtail Member

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    Oct 8, 2019
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    are there more than 1? it is in the ON position. only one I can see. thanks.
     
    septic truck, Oct 8, 2019
    septic truck, Oct 8, 2019
    #3
  5. Oct 8, 2019 #4
    kemosabi49

    kemosabi49 Trucker Forum STAFF Staff Member

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    Should be more than one. Both hoses going through the firewall should be hot.
     
    kemosabi49, Oct 8, 2019
    kemosabi49, Oct 8, 2019
    #4
    OldeSkool and septic truck Thank this.
  7. Oct 8, 2019 #5
    septic truck

    septic truck Bobtail Member

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    Oct 8, 2019
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    I will take another look for another. thanks.
     
    septic truck, Oct 8, 2019
    septic truck, Oct 8, 2019
    #5
  8. Oct 8, 2019 #6
    snowwy

    snowwy Road Train Member

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    Open up the one that you see. If both hoses are hot. You're golden. Although one will be slightly cooler.
     
    snowwy, Oct 8, 2019
    snowwy, Oct 8, 2019
    #6
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