a/c

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Superhauler, Jul 27, 2016.

  1. Superhauler

    Superhauler TEACHER OF MEN

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    keep stroking.
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    The pressure doesn't get high. It has been like this for about 4 months.
     
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  3. Superhauler

    Superhauler TEACHER OF MEN

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    keep stroking.
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    It all works. I have checked power to all the wires.
     
  4. Skate-Board

    Skate-Board Road Train Member

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    t-stats???? That's usually where the trianary switch is installed.

    trinary.jpg
     
  5. Superhauler

    Superhauler TEACHER OF MEN

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    keep stroking.
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    On the KW it is on a pan that sits on top of evap core.
     
  6. Skate-Board

    Skate-Board Road Train Member

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    Anyways, do you have a switch that looks like the picture above on your air dryer?
     
  7. Oscar the KW

    Oscar the KW Going Tarpless

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    On my 07, it was low on freon, wasn't cooling properly, stopped at a auto parts store and got one of those DIY deals and added some, compressor never shut off, wasn't cooling properly either. Bled some off, and it cycled normally and cooled like it was supposed to. Is it possible you have a little to much in the system?
     
    Superhauler Thanks this.
  8. Skate-Board

    Skate-Board Road Train Member

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    Some people still use propane instead of R134a
     
  9. Skate-Board

    Skate-Board Road Train Member

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    Oh, and they play banjos too!
     
  10. 062

    062 Road Train Member

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    What is the highest high side pressure your seeing?
     
  11. AModelCat

    AModelCat Road Train Member

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    Something isn't adding up. That thermostatic switch in the evap core should open at just above freezing to prevent the issue you're having. Starting to wonder if what an above poster mentioned is correct that the thermostatic switch has been bypassed. Or possibly the 2 wires to the switch have shorted together somewhere. Easiest way to test that I would think would be to disconnect your thermostatic switch and see if your A/C operates. If it comes on with it unhooked, its been bypassed.
     
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