Air con sounding like a dump valve!

Most odd! And from a thread I just read I think a re-gassing is on the cards, or as K suggested a recirc valve has gone t1ts up!

Basically with the fan on say no.2 I press the AC button and it suddenly goes fffffsssshhhHSSSHHHTT! (not too loud though) but it sounds weirdly like a dump valve. The air coming out isn't as cold as I'd normally expect it, but it is cold, or more "cool" - maybe it was the 30+ temps yesterday that made me think itwasn't as cold?

Anyway - Looks like I need to pop into my dealers for them to look at the air-con. Any other thoughts? The valve type PFFFSSHT noise only started after visiting Jabba, but they can't be to blame - I'd not used the aircon for a couple of weeks before that - coincidental that I used it after leaving there.

It seems that my car's going through a bad phase at the moment!