Actually Dave it sounds like you broke the A/C thermostat A $110 part at
the dealer, Unfortunatly the only place you can get the part. I spent
five days looking for a place that I could get it cheaper for my old '81
coupe. (Same A/C system) It's a little capilary tube that goes to a
sensing bulb in the A/C Evaporator and the other end hooks onto the temp
Adjuster slider in the A/C controls. It's easy (As Audi Climate Controls
go) to change and takes about 30 min.
Just my $1.05