Originally Posted by flyerhky11
Sealed from atmosphere? What do you mean by that?
that the a/c was not open!
"when an a/c system has been opened to the atmosphere, such as during installation or repair, it must be evacuated using a R134-A refrigerant recovery/recycling/charging station.If the system has been open for several days, the receiver/dryer should be replaced, and the system should be evacuated for several hours."