air conditioning not working

Thanks for your reply. It's been to a main dealer service centre and after their dianistic checks they said it was the pressure sensor which was fixed at a cost of £215. Problem still there and now they say there's a small leak in the front left pipe under wheelarch - another £600. I now don't trust them and not sure if their diagnostic check looked at the compressor or if there was a fault with the pressure sensor in the first place

Audi Q7 2013 Model, its aircon system not working- not blowing the air (hot or cold). It has been re-gased yet still not working. Diagnosis done suggests a fan sensor. Is the car sense different from the motor. In my view, it is, but not sure. If it the motor, the test would not have said sensor. Pls advise.