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My 4 year old Q7, 3 months out of warranty has an AC problem. When I press the AC button, the red LED goes off the moment I remove the finger from it and, of course, no cold air comes out. Blower is working as air comes out, just not cold. Note, the same happens when I press the MAX AC button, red LED goes off and no AC.
It tells me that the car knows that the AC is not working. But what would that be?
Any suggestions is appreciated