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ac compresser not shutting down, overheating 850 1996

posted by  someone claiming to be kelly on  Fri Apr 23 01:50 CST 2004 [RELATED]

well its just one more thing, yesterday started using ac, compressor seems to run non stop, then will overheat and shut down for long periods of time. when i can get it to work again works fine but will not circulate on and off. get overheated and shut down. dose anyone know what it is? how to fix, if not fixable how much volvo will carge to fix. thanks, kelly








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    ac compresser not shutting down, overheating 850 1994

    posted by  someone claiming to be Frank D on  Sun Apr 25 09:11 CST 2004 [RELATED]

    greetings,
    i had this exact problem, it got fixed when i replaced the compressor. FCP groton has about $325, plus fliter. do it yourself not too bad a job.
    i replaced the cycling switch etc etc. to no avail tried everything spent lots of $$$.i wish i would have replaced the compr. first,
    mine would work for 10-20 minutes then shut off for 10 minutes got worse over time, has overheat device and timer i believe when temp of refrigerant (or compressor?) overheats it shuts down the compressor till everything cools, maybe this type of compr wears more quickly because it cycles? not sure, typical Volvo money pit,
    good luck
    frankd, south florida







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    ac compresser not shutting down, overheating 850 1996

    posted by  someone claiming to be Ray N. on  Fri Apr 23 04:44 CST 2004 [RELATED]

    Wouldn't a low level of refrigerant cause it to overheat and
    shut down? Since slow leaks are so common as to be considered
    normal I would have a look at that. My 98 is low on refrigerant
    and will run about 5 minutes then blows hot air for 15 then
    will run again for 5 minutes. My plan is to have it recharged
    (soon) for this summer.

    The local dealer sometimes runs a special where they remove the
    existing refrigerant and add back the exact correct amount along
    with a dye pack (for detecting future leaks). Cost was around $100.







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    ac compresser not shutting down, overheating 850 1996

    posted by  someone claiming to be AlvinL on  Fri Apr 23 04:04 CST 2004 [RELATED]

    Look for the pressure switch on the upper A/C line close to the firewall. That switch lets the compressor run if there's enough refrigerant (pressure). Unplug it and see if the compressor stops. I'm guessing the pressure switch is defective or maybe there's a short somewhere.








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      ac compresser not shutting down, overheating 850 1996

      posted by  someone claiming to be kelly on  Fri Apr 23 04:29 CST 2004 [RELATED]

      thanks will give it a try. kelly







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