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A/C Issue XC90 2004

posted by  kyswisher on  Wed Jun 25 14:51 CST 2014
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last visit: Thu Jun 26 07:44 CST 2014
[RELATED]

My 2004 XC90 2.5L, which has been overall a very good car, has developed an A/C issue.

During highway driving after some use (30 min+) the A/C will begin to blow non-refrigerated air.

I can cycle the A/C off using the cabin shut off button, wait a minute or so, and when I turn it back on, all seems fine until the next occurrence, which can be 15 minutes later.

I have checked the condensation drain, which seems okay.

When I put a gauge on the A/C line my pressures look good.

Your thoughts?








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    A/C Issue XC90 2004

    posted by  KlausC on  Wed Jun 25 14:58 CST 2014
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    last visit: Fri Oct 24 10:15 CST 2014
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    We just had a problem with an earlier model: The sensor in the evaporator died and it started to freeze up. If the compressor stays on without cycling after the cabin temp feels normal, check the sensor. It is to the right of the gas pedal. Also, make sure the recirculate switch is off.

    On older cars, 850ish, it is usually a clutch gap that needs shimmying.
    --
    My back feels better when I sit in a Volvo seat








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      A/C Issue XC90 2004

      posted by  kyswisher on  Thu Jun 26 07:45 CST 2014
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      last visit: Thu Jun 26 07:44 CST 2014
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      Just ordered an evaporator temp sensor replacement from FCP. Hoping the $35 sensor will fix this.








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        A/C Issue XC90 2004

        posted by  someone claiming to be jeff on  Fri Jul 25 20:42 CST 2014 [RELATED]

        My money is on ac clutch gap. this happened on my 2010 volvo sv50 so its not an "older" volvo only issue.








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      A/C Issue XC90 2004

      posted by  Chris Mullet on  Thu Jun 26 07:42 CST 2014
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      last visit: Fri Oct 24 09:08 CST 2014
      [RELATED]

      Below is a picture of the evaporator sensor on my 2003 V70 - should be the same as your's I would imagine. When you drop the drivers side under-dash kick panel you can look up above the gas pedal a few inches and the sensor is poked into the LH side of the evaporator box. You will only see the rectangular plug part of the sensor until you pull it out - just a snap-in friction fit.

      If you want to test the sensor resistance, from what I'm told a good sensor will read 10K ohms +/- 200 at 32 deg F and approx 3K ohms 77F. My old one was waaaayyyy out of whack. But when I got the new one in the mail I had loaned my one-and-only ohm meter to a fellow worker so I couldn't verify the resistance on the new part. All I know is that I installed it and now the compressor cycles as designed.

      When you reinstall the sensor, make sure you clock the connector to the same orientation as it was originally so that the business end of sensor is adequately sensitive to the cold evaporator. In my case the connector was straight up.









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        A/C Issue XC90 2004

        posted by  kyswisher on  Thu Jul 3 05:53 CST 2014
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        last visit: Thu Jun 26 07:44 CST 2014
        [RELATED]

        Evaporator sensor replacement did not do the trick. Re-shimming may be the solution, but the compressor appears to be impossibly positioned. A visit to Volvo mechanic is probably in my future.







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