Air conditioning not getting cold

[davros 01]

Dear Everybody!

We have a 2004 toyota yaris 1.3 vvti with the air con. We are in the uk and its a uk car. For some reason the AC is now no longer working. The blowers blow air, fans working etc, but when you press the AC switch, the green light comes on to tell you its working, but no cold air comes out at all.

I have checked the fuses in the engine bay, and all are ok. Are there any other fuses in the car etc I have missed? Does anyone have any ideas what it could be?

There is no evidence of a leak of coolant gas, and the engine bay is clean. What can I do to check / try to find the problem, as its now driving me mad, and I would like to get it working, so that when we have a few more hot days, we dont boil in the car!!

Thanks in advance!