Hi All I have a Vectra on a '51 plate with air con. Sorry that should read "HAD" air con. Yes right at the critical time the air con seems not to work. I usually run it regularly as I was told it must be run at least 15-20 mins a week for the system to hold its charge. How do I diagnose the problem? If there is no gas in the system the compressor can't compress it - so it wont ( I think) pull the engine down on tickover when switched on - and it doesn't. Where does the gas go? - Do I have a leak or does the gas just "disappear?" - How do I know? I have heard it said that the compressor is a favourite to fail and it VERY expensive to replace - discussions with other Vx owners indicates that the local Vx Main Dealer has tried to fit clutch packs to the compressor (other customers) and failed miserably on several occasions - is this normal? This is the first car I have had with air con - and may be the last - it "seems" rather unreliable and VERY expensive especially for the limited summer we get in the UK. I might just have to put up with "rep's elbow" but proper air con would be nice. Any ideas please, group? Thanks Bob .-.-.