Question about 1995 Saab 900

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Thanks for your help

Thanks for you solution. That was probably the most sensible one that anyone has given me. I ended up having a shop put a used fan in ($100), run an ink test for leaks and recharge the system.. which worked well for about two weeks now it's not working again.. the fan still works though! ugh :)

Do you live in this area (Lancaster, PA)?

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  • eliana519 Jul 30, 2008

    They are going to look it over again on Monday (no charge)... we'll see. I'll let you know how it goes.. hopefully your suspicion of the expansion valve is it. (which i think it could possibly be, since when the ac was blowing it would let out a "hissing" noise that I could hear coming from the vents... which led me to believe it was a release valve of some sort :) so maybe !!

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Jeez, talk about no luck! OK, I'm assuming that the leak test showed no leaks, so that's a plus. Now, when you say it's not working again, do you mean that the system isn't blowing cold anymore, or that the fan that was installed no longer works? I'm pretty sure you mean the air isn't cold anymore, but it doesn't hurt to make sure:)

OK, so if the fan isn't the cure (since it's working), and you had a recharge done, which worked temporarily, I'm wondering about two possibilites - one, that the expansion valve isn't working (this is what allows the freon to actually cool - it releases the pressure from the compressor, allowing the freon to expand. When it does that, it cools). That could be one solution.

The other, unfortunately, is the heater core. If your system routes through there, and you have a problem with it, it could create the problem with the AC. I don't know how Saab does their AC system though, so I don't know if your heater core is an integral part of the system.

An idea - my Audi has two fan switches for the AC condenser fan - a low speed switch and a high speed switch. If your car has that too, and only one switch is functional, it could be that you're not getting the full AC effect. That would be worth checking into.

I'm in Binghamton, NY, the best part of four hours from you.

Posted on Jul 29, 2008

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