You can check how much gas is in the system by connecting up a gauge to low side, if the pressure is between 30 and 45psi then you're fine, anything less means it needs gassing..
[TW]Fox;11791802 said:Thats useful - does it require a certain guage or what?
Tom, let me know where you get it done and how much. I'm interested in doing mine aswell. My aircon seems a little warm even tho it's on the coldest setting!
It was last done at Acorn Auto Electrics in Middlesborough back in 2005. It was £50 should be a bit cheaper now I'd think.