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Easy A/C Fix 700 1992

posted by  rjritterjr on  Sat Sep 15 16:33 CST 2012
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last visit: Mon Oct 13 18:09 CST 2014
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A/C suddenly did not cool as well as it had been or should be. New compressor and accumulator installed a couple months ago. Finally got around to snooping under the hood. Pressures seemed fine and pressostat working ok. Then observed that the vacuum hose to the heater valve had either been chafing or too hot and had a decent size hole in it. Spliced in a new section of hose and everything seems to be back to normal.
--
94 944 n/a 256,000 miles; 92 745T 150,000; 03 Odyssey for the wife








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    Easy A/C Fix 700 1992

    posted by  Steve on  Sat Sep 15 20:52 CST 2012
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    last visit: Fri Oct 24 07:16 CST 2014
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    Great diagnosis, to the FAQ.
    Steve
    --
    See the 700/900 "FAQ" at the menu bar top screen left side.








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      Easy A/C Fix 700 1992

      posted by  Chris Mullet on  Sun Sep 16 08:30 CST 2012
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      last visit: Fri Oct 24 09:08 CST 2014
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      If the A/C blows nice and cold at first start-up (cold engine) and then starts blowing warmer as the engine warms up (which is pretty quickly in a Volvo, especially in hot weather) then the heater valve, or vacuum source to the valve, is/are suspect.

      I recall being surprised when I figured out my heater valve had failed in the open position - it takes a vacuum sorce to keep it closed. Then I thought about where these cars come from....







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