How does the air conditioning system work in an Audi 80?

I just got a used Audi 80 and the air conditioning doesn't seem to be working properly. When I turn it on, it blows out warm air. What could be the issue and how can I fix it?

Based on your description, it sounds like there may be a problem with the AC compressor. This can sometimes be caused by a leak in the system or a faulty compressor. I would recommend taking it to a certified mechanic to have it diagnosed and repaired.