Citroen C6 AC Failure

I had similar AC woes with my C6. The symptoms sound very familiar. Does it make any strange noises when you try to turn on the AC, like a clicking or hissing sound?

No strange noises that I can hear, just... nothing. It's like the AC system doesn't even know it's supposed to be working. What was the issue with yours?

In my case, the issue was traced back to faulty valves within the AC system itself. It's a common problem, apparently. I'd recommend taking it to a workshop that specializes in automotive AC diagnostics. They should be able to pinpoint the exact cause. Don't delay, as summer is approaching quickly.

Thanks for the advice! I took it to a trusted mechanic and you were right! Turns out some valves in the AC system were shot. Cost me around 1000€ to get it sorted, ouch! At least I have AC now.