Audi Repair: Audi A3 1.8T 02, audi a3, climate control

Question
I have two problems on my Audi the first being the driver door warning signal comes on when outside air temperature is warm. The second one is climate control is inefficient it is blowing out warm air regardless of temperature setting.
Would be grateful for your help and advise.

Answer
The internal air temperature sensor may have failed, causing the car to think the inside of the car is too cool all the time.  The driver's door warning may be a short in the wiring in the door, or perhaps a misadjustment on the switch which sends the signal.  You have to take the inner door panel off to check these thinsg out.  Good luck,  Jan