Ok, so now that the sun is here, and after having the gas changed the start of May.... my aircon has stopped working! So far, the relay and fuses seem to be ok but both fans at the front aren't turning, and the clutch isn't kicking in. Pressing the low line pressure valve in a bit, stuff is leaking out from the sounds of things, so it can't be empty. Shorting out the pressure switch pins (2 and 3) turns on both fans and engages the clutch for a few seconds, before the clutch disconnects and the fans slow and stop. I haven't got anyway to test just how much gas is in the system so will have to take it somewhere for testing. Anyone got any other ideas of what else it could be? Low gas due to leak? Low gas because it wasn't filled up to the correct pressure? A faulty pressure switch? Am just glad it isn't the clutch shim as I really didn't fancy tackling that!