What are the common issues with temperature control in an Audi 80?

I recently bought an Audi 80 and I'm having trouble getting the temperature control to work properly. The air conditioning and heater both seem to be functioning, but the temperature inside the car is never quite where I want it. Any advice on what could be causing this issue?

One common cause for temperature control issues in an Audi 80 is a faulty thermostat. If the thermostat is not functioning properly, it can prevent the car's heating and cooling system from working effectively. Consider having your thermostat checked or replaced by a professional.