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    Thread: Diagnosing AC fault - 2010 my

    1. #1
      What's wrong with my car?
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      Diagnosing AC fault - 2010 my

      Hi,

      I am sprucing up a newly acquired, used 2010 Aveo5 that had a few issues. I'm an experienced mechanic, but always eager to get good advice and not re-invent the wheel!

      Besides checking brakes, changing fluid, the only minor issues seem to be a stuck/sticking thermostat, TPMS light on, and no A/C engagement when the button is pushed (clutch/compressor does not try to engage). It is a west coast/PNW car w/only ~70k so really very clean. I'm going to swap the thermostat soon and then try to figure out the A/C. Googling the issue did seem to lead me to believe this is a common weak point on these (like the thermostat).

      I have been searching a bit and went through the "tech tips" section. I saw a How-to on compressor replacement, but I'm wondering if anyone has experience with the diagnostic tree and common fault points on this system? I have checked the fuses and swapped the relay as a "duh" check. I have not checked hi/lo pressure yet to see if that is blocking it, in case leaks are common.

      Any suggestions?

      Thank you!



    2. #2
      Should I keep it?
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      Check if the pressure switch is good.

    3. #3
      What's wrong with my car?
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      I am finding lots of recommendations to do that, but no how-to. Any instructions or link? I have been searching for that procedure but no luck.



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