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I did a search and I am leaning towards the o-rings being bad.
Here are the symptoms...
-Suddenly stopped blowing cold air, after 12 years of trusty service
-Had it recharged blowed cold for an entire day
-Next day, blowing warm air, compressor will not turn on at all
My mechanic wants to replace the entire AC system for $1200, which I think is overkill. My research is indicating the compressor is dead, or a combination of o-rings and belts that need to be replaced are bad. I am thinking about picking up a used compressor and having him put that in.
Thoughts? My05 Aero now has 82K on it.
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I'd guess it's an o-ring which allowed all of your refrigerant to leak. As I recall reading from trying to fix dead AC last summer, the compressor has a minimum refrigerant level / pressure in the system to kick on, and I'd guess that's so the compressor doesn't fry itself.
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I have had to replace the oring at least twice on our . Cheap and easy fix. I picked the o-rings up at Advanced auto parts. One other time it was the AC Discharge hose that was bad.
O-ring Issue https://saab92x.com/viewtopic.php?id=30782&p=1
Hose issue https://saab92x.com/viewtopic.php?id=26517
Last edited by WDEagle (2017-04-24 17:51:41)
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Yep, o rings are relatively easy to swap out. I would put in some UV dye and pin point the leak, you can buy R134a with dye it in, put it in and find the leak.
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Refill with R134 with tracer dye. It will work again, temporarily.
Search all components for leaks with a a black light. Replace only what is leaking.
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Yeah definitely do not go back to that mechanic. He's out of his dang mind. Sounds like his troubleshooting process is to just immediately assume everything possibly related is broken and irreparable and so replace it all at maximum cost.
Your compressor is almost certainly fine, since refilling it made it kick on and work until the system leaked out again. As n_r_child and krazy mentioned, there is a pressure sensor that will keep the compressor from engaging if the refrigerant pressure is to low. That's a protection mechanism. You just need to find the leak. If you're not up for doing this stuff yourself, find a different mechanic for this and all future jobs.
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Thanks guys. Followed most of the advice here and did the work myself. Spent nearly 3 hours driving with very cold air today. Didn't quite fill up my system entirely, ran out of refrigerant. Will see in the morning if there is more leakage and more in then. Kind of cool how the compressor just kicks right on as it detects the refrigerant. Overall, simple process!
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Where was the leak?
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O-RING at the top side of the compressor had a crack in it. I replaced both of them at the compressor to be safe. It's possible I have leaks elsewhere. Should have a good sense tomorrow.
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When I was in Dubai, I faced the same situation. My ac started to blow warm air. I couldn't understand what should I do in that new place. Then I contacted ac maintenance Dubai and they repaired my ac.
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george1 wrote:
When I was in Dubai, I faced the same situation. My ac started to blow warm air. I couldn't understand what should I do in that new place. Then I contacted ac maintenance Dubai and they repaired my ac.
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