How to troubleshoot low cabin cooling in Audi A3?

I have an Audi A3 and recently the air conditioning has been blowing out warm air instead of cold. What could be causing this issue and how can I resolve it?

First, check the refrigerant levels in your Audi A3. Low levels can result in poor cooling performance. If the levels are low, you may have a leak that needs to be fixed. In addition, make sure all AC components, such as the compressor and condenser, are functioning properly.

Another potential cause could be a faulty AC control unit or ECU. These control the temperature and regulate the system. Inspect these components and replace if necessary. Also, check for any clogged or dirty air filters, which can impede airflow and cooling efficiency.