Tried the air con the other day, admittedly for the first time in months, and it's not working (I know, you're meant to turn it on occasionally just to keep the seals from drying out but I haven't). On listening carfeully, I can't hear the compressor kicking in which may mean a compressor problem. I did have a problem a few years ago with one of the air con pipes corroding but because a few of the pipes had corroded together, i had to replace a long stretch of pipework which cost a bomb to replace. Anyway, does anyone have any alternative theories as to why I'm not hearing the compressor? I'm getting it looked at tomorrow.