How do I troubleshoot a malfunctioning air conditioning system in my Audi A1?

I have noticed that my air conditioning system in my Audi A1 is not cooling as it should. What steps should I take to diagnose the issue and potentially fix it myself?

First, check to see if the refrigerant levels are low. If they are, you may need to refill the refrigerant or have a leak repaired. You can also try cleaning or replacing the filters in your AC system.

If the issue is not with the refrigerant or filters, it may be a problem with the compressor or other components in the system. In that case, it is best to take your car to a mechanic who specializes in Audi vehicles.