Why is my Audi A2 making strange noises when I turn on the AC?

I recently noticed that my Audi A2 starts to make odd noises whenever I turn on the AC. It sounds like a clicking or rattling noise. Can anyone explain why this might be happening and what I can do to fix it?

Your AC compressor might be failing or the belt could be loose. I suggest getting it checked by a professional mechanic before it becomes a bigger issue.

Check your car's air filter and see if it needs to be replaced. A dirty or clogged air filter can cause strange noises from the AC system.

If your car has been sitting for a while without using the AC, it's possible that mold or mildew has accumulated in the vents. Try running the AC on full blast for a few minutes to see if the noise stops.