How can I troubleshoot air conditioning issues in my Audi 80?

My Audi 80's air conditioning is not working properly and I need help figuring out what the problem might be and how to fix it. It's not blowing cold air and I want to make sure I can solve the issue without spending too much money.

First, check the compressor to see if it's functioning properly. If it's not, it could be a sign of a larger issue. Try cleaning or replacing the compressor before seeking professional help.

Check the refrigerant level to make sure it's not low. Low refrigerant can cause the air conditioning to blow warm or lukewarm air. If the level is low, have a professional check for leaks before adding more refrigerant.

If the compressor and refrigerant levels are fine, it could be a problem with the blend air door or its actuator. This controls the temperature and air flow within the system. Check for any obstructions or damage to the door and actuator.