AC Issues My AC stopped cooling and some hiss noise from vents. Sent the car to TASS and according to them they found no gas in the system but strangely also found no leakage in the AC system as well as coil.They kept the car for 4 hours on the gas pressure check and 4 hours for the coil pressure check.Now they have charged the AC system system again and given to me.The AC coil is a problem area in Linea and am scared again this issue will crop up. my car is run 67000 Kms and is in EW expiring on 20-3-2013. But my question is if there is no leakage how the gas leaked out and would a pressure check will find the leakage efficiently or these guys just want to escape the EW by temporally reffing the gas. kindly help guys on the issue.