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2004 V70 AWD 266K miles A/C V70-XC70 2004

posted by  Marlin Mangels on  Tue Aug 3 04:32 CST 2021
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last visit: Tue Oct 21 15:41 CST 2014
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95 degree temp, idle at airport waiting for passenger, A/C stops working. After a few minutes at 70mph on interstate, it starts working again. When it happened again a few days later, I used broomstick test on clutch to engage it.Installed aluminum shims on compressor clutch. Problem solved until traveling on 100 degree day, A/C stopped working again while idling at fuel stop. Checked shims, still in place. Again after few miles at 70mph, started working again. Should I use thicker shims, or is the clutch electromagnet getting weak & fails at elevated temps? Thanks for any help.
Marlin








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    2004 V70 AWD 266K miles A/C V70-XC70 2004

    posted by  derek uk on  Tue Aug 3 08:33 CST 2021
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    last visit: Fri Oct 24 12:33 CST 2014
    [RELATED]

    Low gas? Faulty low pressure switch?








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      2004 V70 AWD 266K miles A/C V70-XC70 2004

      posted by  Marlin Mangels on  Fri Aug 6 08:06 CST 2021
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      last visit: Tue Oct 21 15:41 CST 2014
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      With engine off, low side pressure is 84psi at ambient temp of 72 degrees F. I read on the 700/900 FAQ that the compressor can shut off at temps above 100 degrees F. due to overheating. FAQ recommends turning on recirc to decrease temp of refrigerant returning to compressor. Does that sound like something I should do on the V70?
      Marlin








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        2004 V70 AWD 266K miles A/C V70-XC70 2004

        posted by  KlausC on  Fri Aug 6 12:04 CST 2021
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        last visit: Fri Oct 24 10:15 CST 2014
        [RELATED]

        The low pressure side can only be checked with the compressor running. When engine is off the gas will expand with heat and give you a false reading.

        When the cabin temperature is above 100F, the ECC will close the outside vent and use recirc only. But that is to cool the cabin faster.

        You might want to flush out the condenser/radiator/inter cooler with water spray. There could be a lot of dirt between the fins.

        Make sure both cooling fans are running when the engine an cabin are hot, not just one side.
        --
        Keeping it running is better than buying new







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