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850 AC problem 850

posted by  Quinn388 on  Thu Aug 13 02:47 CST 2009
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last visit: Fri May 4 12:06 CST 2012
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Hello, I was wondering if anyone knows how to maybe fix this problem. I have a 95 850 turbo which was leaking a little 134a (would last about a week) I added a couple cans of AC stop leak, to find out that it was just the schrader valve. Now that I replaced that, the system seems clogged. Line going into evap will get cold, but not blow any cold air, plus, the line coming out of the evap is totally warm. Seems like the evap may be clogged. Any idea would be appreciated.
Also, when the compressor cycles, it will click on for a second, then off for about a min. When low pressure valve is bridged, the line going to the evap will ice up almost immediately, but still will not blow cold.
Thanks again.








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    850 AC problem 850

    posted by  Quinn388 on  Fri Sep 18 04:52 CST 2009
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    last visit: Fri May 4 12:06 CST 2012
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    Follow up.

    Problem solved. Bought all new o-rings, ac oriface tube, accumulator.

    Removed all the lines and flushed with off the counter ac flush. Works better than it ever did with no leaks. Saved the evap.

    Thanks.








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      850 AC problem 850

      posted by  KlausC on  Fri Sep 18 10:41 CST 2009
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      last visit: Fri Oct 24 10:15 CST 2014
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      Good news! I love it when I am wrong, I learn a lot that way!!!

      Perhaps the stop leak fixed the leak in the evap? The accumulator was probably full of junk by now, causing the low pressure.

      Klaus
      --
      Mistakes make us learn. Beer is for a job well done.








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    850 AC problem 850

    posted by  KlausC on  Thu Aug 13 05:05 CST 2009
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    last visit: Fri Oct 24 10:15 CST 2014
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    What kind of "stop leak" did you use? If it was just a 12-14oz can with a little stop leak in it, that will not present a problem.

    If you used a 3oz can of stop leak, times two, and did not follow it up with a can of r134a, that will mess up the schrader valve. Any outside air in your system will gum up the internals, fill up the dryer/accumulator, and generally screw up the system.

    Rapid cycling is normally caused by low pressure and low amounts of R134a. In your case, the stop leak might have gummed up the evaporator and now you are out of luck.

    Time to roll the windows down or get the evap system replaced.

    Klaus
    --
    The more I learn, the more I forget. So why learn?








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      850 AC problem 850

      posted by  Quinn388 on  Thu Aug 13 06:33 CST 2009
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      last visit: Fri May 4 12:06 CST 2012
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      Actually it was the 3 oz can of stop leak, and the can of the 134a with stop leak. Did follow up with a can of 134a. Schrader valve is totally free not stuck. The thing is, the line going into the evap is cold, the line (and the evap itself) are warm to the touch. Something preventing it from circulating.

      Radiator/AC shop said that could remove all the lines and chemically treat and flush the system. All I would need is a new expansion valve and new drier. We'll see if that works.








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        850 AC problem 850

        posted by  KlausC on  Thu Aug 13 06:52 CST 2009
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        last visit: Fri Oct 24 10:15 CST 2014
        [RELATED]

        Your problem, along with a large evap leak (adding a can once a week) is now a clogged evaporator. Yes, the lines will need to be chemically cleaned, along with the compressor and condenser. The accumulator is toast, but that is a relatively cheap part.

        You need to replace the evaporator. It is toast.

        Klaus
        --
        The more I learn, the more I forget. So why learn?







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