I'm on my THIRD cabin temp sensor, and it's been acting funky for the last 6 months...you'd think a Swedish car would have a bulletproof climate control system.
Have you tried resetting the damper motors?
There's a "damper" in the system with an arm that's under the glovebox, and it sometimes falls off it's shaft or breaks. Also, there's a TSB technique to reset the damper motors with the ACC button akin to holding down the "cont.-alt.-del" buttons on a old DOS computer. Try....
http://www.brickboard.com/AWD/index.htm?id=656230
Cost $0.00
Just a couple of shots in the dark.
-Samurai Jack
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