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A/C high and low side

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    #1

    A/C high and low side

    I have searched everywhere including my chiltions, all data, google, and this site and i cant figure which port is the low side of my ac system. There is a port next to the rad on the top side. There is also a port next to the compressor with a redish cap.

    When i charge the system its the low side i connect to right?
    visit vgruk
    Tags: None
    #2
    Is your system converted to R134a?

    Low side is the line that comes from cabin and goes directly to compressor. Usually, this line has blue cap. High side is usually with red cap.

    Service manifold/gauge fits only one way since the two lines have different size taps, anyways.
    A&P-IA

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      #3
      Originally posted by oyajicool View Post
      Is your system converted to R134a?

      Low side is the line that comes from cabin and goes directly to compressor. Usually, this line has blue cap. High side is usually with red cap.

      Service manifold/gauge fits only one way since the two lines have different size taps, anyways.
      No, im putting es-12a into it
      visit vgruk

      Comment

        #4
        I'm curious about using ES12 myself, too.

        Are you using a gauge set for R12? Does your system have R12 still?
        A&P-IA

        Comment

          #5
          Originally posted by oyajicool View Post
          I'm curious about using ES12 myself, too.

          Are you using a gauge set for R12? Does your system have R12 still?
          it still has r12 and according to Enviro Safe i can just drop in the r12a and it will work. I ordered the master recharge kit and it comes with 2 cans of 12a, 1 can of stop leak, 1 fitting, and a hose. no gauges. On our cars there is a sight glass on the top of the cooler/dryer that will go clear once it is up to pressure.
          visit vgruk

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            #6
            When I got my LX, it had R134a conversion done already. The dryer didn't have sight glass already. Recently I've done re-charge of the system along with new dryer installation. This new dryer does not have sight glass either.

            If I was to use ES12, I'd have to use gauge set to charge properly.

            I read it some place that you don't want wait till sight glass is all clear when you are charging the system with ES12, IIRC.
            A&P-IA

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              #7
              Low is by the radiator cap.
              wat?

              Comment

                #8
                high pressure side is most often a small tube where low pressure is a larger tube. just another way to distinguish. If the system runs, the low side will also be cold.

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