How to troubleshoot malfunctioning air conditioning in an Audi A6?

My Audi A6 air conditioning is not working correctly. What steps can I take to find the root cause and potential solutions?

First, check the coolant levels and ensure they are at the recommended level. If the levels are low, top off with new coolant. If this does not fix the issue, it could be a problem with the compressor and should be checked by a certified mechanic.

An often overlooked issue is a clogged cabin air filter. This can cause the air conditioning to not work properly. Check the filter and replace if needed.