I have a 98 A8. When the AC is on, only the passenger side of the front vents blow cold air, the driver side is luke warm. I pulled the center vents and it is definatley coming from where the fan air originates. Iranthe AC code and the left digital display reads: 03.3. Interior Temperature Sensor, in Instrument Panel, sporadic open. Does anyone know where this sensor is located on the A8? I have no clue and would rather not send to the dealer. Please help.

 

The interior temp sensor is located inside the a/c control head. But more than likely the problem is with one of the temp blend doors, its a dual climate design.

 

i got kinda the same problem on my 96 a4 2.8. the center vents are nice and cold, but the two outer vents are luke warm and really only get cold when the sun isnt out and ive been driving for a while. what could cause this.