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Messed up climate control unit (automatic) 850

posted by  VolvoSmitten on  Wed Jun 11 11:35 CST 2008
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last visit: Sun Aug 21 15:05 CST 2011
[RELATED]

Hello All,
I'm at my wits end. Just last week my ac went on the fritz.After checking the electrical connections, it was determined that the electronic climate control unit was at fault. Trouble is that the local "stealership" is asking for my firstborn for a replacement unit. Any help in locating a reasonably priced unit will be greatly appreciated








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    Messed up climate control unit (automatic) 850

    posted by  someone claiming to be fixit2003 on  Mon Jun 16 03:21 CST 2008 [RELATED]

    Have you tried cleaning out the temp sensors up behind the grab handles. They tend to get glogged w/ dust. Remove the plastic cover and CAREFULLY clean out the opening w/ some canned air. There's a fragile thermistor located indside and a little fan assy so be carefull.








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    Messed up climate control unit (automatic) 850

    posted by  Ozark Lee on  Wed Jun 11 12:51 CST 2008
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    last visit: Thu Jan 3 22:08 CST 2013
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    eBay! There are several there that range from $10.00 to $100.00. You can change the unit yourself in about 5 minutes.

    ...Lee








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      Messed up climate control unit (automatic) 850

      posted by  VolvoSmitten on  Wed Jun 11 15:30 CST 2008
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      last visit: Sun Aug 21 15:05 CST 2011
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      thank you sir. I'll check it out








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        Messed up climate control unit (automatic) 850 1995

        posted by  someone claiming to be dave on  Sun Jun 15 20:46 CST 2008 [RELATED]

        Mine car seems to have long/always had unclearable ECC err codes, but it behaves itself nicely (ie, it's symptomless) anyway, unless 2 the cabin temp sensors by the front door grab handles (headliner) are acting up. I've had to pull them out and blow them clean twice over the car's 13 years.







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        Messed up climate control unit (automatic) 850

        posted by  KlausC on  Wed Jun 11 17:20 CST 2008
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        last visit: Fri Oct 24 10:15 CST 2014
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        Make sure it is the same year 850. I got a good backup from Strandberg auto, Wis for $200. Pay close attention to the picture on ebay. Some of them may have stored codes that will not clear. My 1995 was not a problem.

        What kind of codes indicated that the unit failed?

        Klaus
        --
        I still miss my 164








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          Messed up climate control unit (automatic) 850 1994

          posted by  VolvoSmitten on  Mon Jun 16 14:37 CST 2008
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          last visit: Sun Aug 21 15:05 CST 2011
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          Hello All,
          Thanks for all your input. Turns out to be the control unit.Found one at a junkyard for $40 that works well.
          However, I have another question; What is the exact cause that throws out a 315 code. From what I've read, it indicates a problem with the EVAP system. thanks for your answers








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            Messed up climate control unit (automatic) 850 1994

            posted by  KlausC on  Mon Jun 16 17:21 CST 2008
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            last visit: Fri Oct 24 10:15 CST 2014
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            Glad you got a good unit for only $40. Check and clear any codes and lets hope that it stays well for a long time.

            The Evap problem is usually a check valve between the evap cannister and manifold. My turbo has more than one. They are a pain to check because it is near to impossible to remove the vacuum line. Just try blowing through the reverse end, if that works you need a new check valve.
            Also check the cannister for hairline cracks.

            Klaus
            --
            I still miss my 164







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