What are the common issues with the air conditioning system in an Audi 80?

I recently bought a used Audi 80 and noticed that the air conditioning system doesn't seem to be working properly. The fan blows warm air and there is a strange smell when I turn it on. Does anyone know what could be causing these issues?

One of the most common issues with the air conditioning system in an Audi 80 is a faulty compressor. If the compressor is not functioning properly, it can cause the fan to blow warm air and can also lead to strange smells. It is best to have a mechanic check and possibly replace the compressor if necessary.