Thanks very much. I wish I could be as handy as you are:)). Pro

info is very useful. Next time when the same problem happens, I will ask him or another ac guy to test the leak first then probabley use the ProSeal to seal the leak area.

Thanks again. I am glad I posted the question even I didn't really expect to get much answers. I am supprised and amazed how many 高手ｓin here.