How can I fix the air conditioning in my Audi A4?

The air conditioning in my 2015 Audi A4 is no longer working. The air blows, but it's not cold. What could be causing this issue and how can I fix it?

First, check to make sure the AC compressor is engaging when you turn on the AC. If it is not, there may be an issue with the compressor itself or with the wiring. You may need to take it to a mechanic for further diagnosis and repair.

If the compressor is engaging but the air is still not cold, it's possible that the refrigerant level is low. You can try purchasing a DIY recharge kit and adding more refrigerant, but it's recommended to have a professional do this as they can also check for leaks in the system.