Where is the evaporator switch, trying to diagnose a/c

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  • clydesdale
    Mod Crazy
    • Aug 2006
    • 631

    #1

    Where is the evaporator switch, trying to diagnose a/c

    My compressor is not getting power. I have by-passed the pressure switch. I have tested the a/c switch and it is not working properly. If I hold it in there is continuity where there should be, but if I just push it in, there is continuity and then there is none. I have to physically hold it in place to keep continuity. The area of the switch that is giving trouble, goes to the evaporator temp switch. Where is that?
  • Doughnut
    E30 Modder
    • Oct 2007
    • 869

    #2
    The temp switch is mounted to the compressor, be carefull removing it as it will twist up the wires a little.

    Part #5:
    http://www.realoem.com/bmw/showparts...07&hg=64&fg=50

    GL!
    ///Monstrosity. (OO≡≡[][]≡≡OO)

    Aside from showing yourself to be offensive, lacking experience and ignorant in the ways of business, you're also illiterate and imprudent. Beyond that, your sense of liability is severely impaired.

    Comment

    • clydesdale
      Mod Crazy
      • Aug 2006
      • 631

      #3
      Thanks. My compressor is not turning on. It will turn on if I jump the 12v directly to it. But when I hit the switch in the car, there is not 12v at the compressor. I have bypassed the high low switch and that did not do it either. Any idea how to check this switch or bypass it? I just want to make sure that the evaporator temp switch is not the problem. Thanks

      Comment

      • twright
        Mod Crazy
        • Sep 2008
        • 707

        #4
        Do you just have a bad a/c switch on the dashboard?

        Comment

        • clydesdale
          Mod Crazy
          • Aug 2006
          • 631

          #5
          I am not sure, I am getting a used working one to make sure.

          Comment

          • clydesdale
            Mod Crazy
            • Aug 2006
            • 631

            #6
            ok, I may have named the part wrong, it is not a switch, it is a sensor. Where is the evaporator temperature sensor?

            Comment

            • Jean
              Moderator
              • Aug 2006
              • 18228

              #7
              It's in the ac/heater box, IIRC on the drivers side.
              Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



              OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

              Comment

              • clydesdale
                Mod Crazy
                • Aug 2006
                • 631

                #8
                Any pics of that?

                Comment

                • clydesdale
                  Mod Crazy
                  • Aug 2006
                  • 631

                  #9
                  Anybody have a pic of this thing. I can't find it. Thanks.

                  Comment

                  • Jean
                    Moderator
                    • Aug 2006
                    • 18228

                    #10
                    #7 http://www.realoem.com/bmw/showparts...17&hg=64&fg=30
                    Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



                    OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

                    Comment

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