Climate problem Audi A8 D2

Hello, I'll introduce myself.

My name is Christopher, I am proud owner of an Audi A8 3.7 Quattro, Bj 12/97, full equipment, stitching and 1st hand, yes now I am 2ter. Laughing

Now to my problem, my climate only heats up, even if I put it on low. Unfortunately.

I am very satisfied with the car, I now had the error memory read out there was G140 or V109, in other words: the footroom control was without current.
Does that have anything to do with my problem?
Is the gas empty? If he at least did not always heat that the air comes in from outside to me would at least be enough for the first time, although the climate should already go.

I hope I could explain my problem a little bit, ask for any help.

Mfg from the sunny Eging at the lake