W900 heater controls

Discussion in 'Kenworth Forum' started by snowmankw, Mar 9, 2015.

  1. snowmankw

    snowmankw Bobtail Member

    3
    1
    Mar 9, 2015
    0
    Im working on a '80 w900a and Im replacing the air lines for the heater controls on the max A/C and recirculate switchs, my problem is the output airline is gone on the max A/c side and I cant figure out where it goes to, can someone please tell me where this line hooks up to, I included a picture of the heater controls, Thanks

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    Last edited: Mar 9, 2015
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  3. Thed302

    Thed302 Light Load Member

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    Oct 30, 2014
    USA
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    Last six of the VIN please?
     
  4. snowmankw

    snowmankw Bobtail Member

    3
    1
    Mar 9, 2015
    0
    Heres the whole vin number its 179252s
     
  5. Thed302

    Thed302 Light Load Member

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    Oct 30, 2014
    USA
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    I'll get back to you on this tonight, for reasons I'd like to keep under wraps.
     
  6. Vampire

    Vampire Medium Load Member

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    May 14, 2011
    Transylvania
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    I have that same AC/Heater unit on my 78 KW. Any tips on troubleshooting, and getting it to work would be appreciated. I made the AC compressor turn on locally the last time I was messing around, but that was as far as I got. When manipulating the controls on the box, all I get is an air hissing sound, and that's it.
     
  7. bigguns

    bigguns Road Train Member

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    Omega,GA
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    My guess says it goes to the fresh air/recirculate door. Max a/c is achieved by closing off the outside air and recirculating the cab air.
     
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