I have done a search but couldn't find anything about my specific problem.
I have a 2005 A4 2.5Tdi Cab and am having a weird problem with the climate. It blows out cold air fine and the air con is working no problem but if i want the heating on the it still only blows out cold air.
Maybe i would get some thing slightly warm for a second or two but then it goes back to being cold even on the 'High' setting.
Does anyone have any ideas? Some one suggested it might be the head unit but i cant see how as all else seems to work fine??