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W900 freeze switch

Discussion in 'Trucks [ Eighteen Wheelers ]' started by KittyKicker, Jul 30, 2019.

  1. Jul 30, 2019 #1
    KittyKicker

    KittyKicker Light Load Member

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    Dec 27, 2015
    0
    I have a 2003 W900 that I had to pull the heater box apart on. In my haste I didn't pay attention to the wires on the freeze switch. They are both green with a white stripe. How do I know which one plugs into which tab on the switch?
     
    KittyKicker, Jul 30, 2019
    KittyKicker, Jul 30, 2019
    #1
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  3. Jul 30, 2019 #2
    spsauerland

    spsauerland Road Train Member

    4,296
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    May 31, 2010
    West Harrison, In
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    Doesn't matter, switch/circuit operation will be the same.
     
    spsauerland, Jul 30, 2019
    spsauerland, Jul 30, 2019
    #2
    Oxbow, Art Vandelay, AModelCat and 2 others Thank this.
  4. Jul 31, 2019 #3
    KittyKicker

    KittyKicker Light Load Member

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    Dec 27, 2015
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    When I put power to the wires with my test light, one grounded and one did not so I put the ground on the indicated stud of the freeze switch. Made sense to me so hopefully it's ok. Previously the ac compressor would not shut off and the evaporator would freeze up. I think it is because there was no ground at the freeze switch. We shall find out I suppose. Fingers crossed!
     
    KittyKicker, Jul 31, 2019
    KittyKicker, Jul 31, 2019
    #3
  5. Jul 31, 2019 #4
    terryt

    terryt Heavy Load Member

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    Apr 27, 2009
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    You mean the low pressure switch and they go bad a lot. Also could be the dryer , expansion valve and high pressure switch or low on Freon causing freeze up
     
    terryt, Jul 31, 2019
    terryt, Jul 31, 2019
    #4
    KittyKicker Thanks this.
  7. Aug 3, 2019 #5
    KittyKicker

    KittyKicker Light Load Member

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    Dec 27, 2015
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    No, this truck has a freeze switch in the evaporator box. It has a high pressure switch, a low pressure switch and a freeze switch.
     
    KittyKicker, Aug 3, 2019
    KittyKicker, Aug 3, 2019
    #5
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