hi newbie here, i have a problem with my air con on my 51 plate 1.9 TDi zetec, it doesnt seem to switch on at all, the yellew light on the AC button when pressed comes on and thats about it, whilest changing the oil the other day i founed that a U bend pipe was snaped so i have fixed it with some leak-fix paste and fibre glass, which i raped around the pipe, it seems to have done the job of holding the pipe in place now i need to find out if the loss of gas in the system prevents the air con coming on or do i have a relay that isnt working?....i hope someone out there can help me out on this one.