Quick query in case anyone can shed any light on this.
Bought an A6 3.0tdi today, and seller had explained a problem with the aircon, which I'm okay with, but wondered if anyone had come across something similar before the dealer charges me an arm and a leg just to trace the fault!
Irrespective of where the temperature is set at on the control box all the vents, bar the middle two, which I've set for cooler air, pump out very hot air. If you turn the temp up to Hi then turn it back down again it works for a while then just builds back up again.
Sounds to me like a valve or a sensor has failed and just letting the car keep pumping hot air in, but thought I'd check before spending a fortune getting to the bottom of it.
Thanks for any advice.