Not sure if its the right section but i recently noticed that my aircon is not working in my s2 au falcon. When the aircon is turned on the pipe that runs along the passanger side next to the airpox gets icy and cold, visably so. but i get no cold air inside the car. Any ideas where i should start looking or what to test to get it working? Would it simply be a matter of needing to be re gassed?