How do I troubleshoot a malfunctioning Audi A4 AC compressor?

One day, while driving my Audi A4, the AC just stopped working. I tried to turn it on again, but it still won't cool the cabin. How do I fix this issue?

First, check the freon levels in your AC system. It's possible that it has just run low and needs to be refilled. If that doesn't work, you may need to replace the condenser or the entire compressor. Contact a certified Audi mechanic for assistance.

I had the same issue with my Audi A4. After checking the freon levels and replacing the condenser, I still couldn't get the AC to work. It turned out that there was a faulty pressure sensor that needed to be replaced. Get your car checked by a professional to pinpoint the exact cause of the problem.