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A/C cuts out, restart fixes it S70

posted by  tina on  Sun Apr 13 09:29 CST 2008
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last visit: Thu Nov 24 09:34 CST 2011
[RELATED]

This has happened to me once or twice in the past few years, but about 4 times this weekend (over 80 degrees out of course... may be related). The A/C works fine in cool weather, but sometimes in very hot weather, it runs good when the car is started, then it starts getting *really* cold - icy cold - then suddenly stops working and warm humid air blows out the vents. Turning the car or the A/C switch off for a few minutes and re-starting fixes the problem and we have cold air again.

This weekend we went on a road trip in 80+ degree weather and this was very annoying.

I suspect it is a sensor problem, since the A/C itself is certainly blowing cold air almost all the time.

Any hints on where I might have a problem?

Thanks and have a great weekend :)








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    A/C cuts out, restart fixes it S70

    posted by  KlausC on  Mon Apr 14 10:13 CST 2008
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    last visit: Fri Oct 24 10:15 CST 2014
    [RELATED]

    Tina, sounds like a bad expansion valve. Which you don't want to replace unless you have an SM streak :) It is next to the evaporator, behind the dash.

    I would just live with it, so long as you can turn off the AC for 5 min and then turn it back on again. An AC shop can verify this.

    If the AC dryer/accumulator is very cold, that might also be an easier problem.

    Klaus
    --
    The 164 has a new home, all I am left with are a 95 854T and a 98 V70R :)








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      A/C cuts out, restart fixes it S70

      posted by  someone claiming to be Hawkeye on  Tue Apr 15 07:10 CST 2008 [RELATED]

      My S70 (which my 19 yr old daughter totaled last weekend) had a similar problem. The windings in the clutch at the compressor had a problem. I was getting 12V to the compressor but it was not turning as the clutch would not engage. My indie mechanic said the clutch and compressor were made as one and would have to be replaced as a unit.

      Hope that helps.

      Hawkeye








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        A/C cuts out, restart fixes it S70

        posted by  KlausC on  Tue Apr 15 11:25 CST 2008
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        last visit: Fri Oct 24 10:15 CST 2014
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        Sorry, but that is not true. The clutch is replaceable. But using plastic bread closure tabs makes for very cheap and easy clutch shims :)

        Klaus
        --
        The 164 has a new home, all I am left with are a 95 854T and a 98 V70R :)








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          A/C cuts out, restart fixes it S70

          posted by  tina on  Tue Apr 15 19:41 CST 2008
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          last visit: Thu Nov 24 09:34 CST 2011
          [RELATED]

          How would I shim the clutch if that turns out to be the case?








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            A/C cuts out, restart fixes it S70

            posted by  KlausC on  Wed Apr 16 03:45 CST 2008
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            last visit: Fri Oct 24 10:15 CST 2014
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            What a great idea:

            http://volvospeed.com/vs_forum/index.php?showtopic=80181

            Klaus
            --
            The 164 has a new home, all I am left with are a 95 854T and a 98 V70R :)








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              A/C cuts out, restart fixes it S70

              posted by  tina on  Fri May 2 14:02 CST 2008
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              last visit: Thu Nov 24 09:34 CST 2011
              [RELATED]

              Excellent, thanks!! I'll do the test this weekend and go find some bread ties if I can. Of course bread comes in paper bags where I am from, where can I find those plastic things?








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                A/C cuts out, restart fixes it S70

                posted by  KlausC on  Fri May 2 16:55 CST 2008
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                last visit: Fri Oct 24 10:15 CST 2014
                [RELATED]

                Sorry, Tina, I just couldn't resist.

                Ask a couple of co-workers to get you a total of 4 plastic tabs. An extra one for just in case.

                Klaus
                --
                The 164 has a new home, all I am left with are a 95 854T and a 98 V70R :)








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                A/C cuts out, restart fixes it S70

                posted by  KlausC on  Fri May 2 14:51 CST 2008
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                last visit: Fri Oct 24 10:15 CST 2014
                [RELATED]

                Go to a supermarket and steal a few of them!!! :)

                Klaus
                --
                The 164 has a new home, all I am left with are a 95 854T and a 98 V70R :)







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