回复：need to know where is the leaking and how fast.

来源: 于 2013-06-25 13:19:45 [旧帖] [给我悄悄话] 本文已被阅读：次

I think the unit came with the house, 1992. If that old, should I stll test the leak?  
The guy said he is going to find the leak before install the new unit.
 Should i change a R22 unit or 410A?