I think he was talking about just the compressors and not the whole units. Yes the compressors have oil in them and they have to be drained. I have never been asked any questions about them when brought to the yard, only when I bring whole units do they ask about the coolants being proberly removed. Just like the coils and/or rads. that come out of ac units they don't ask any questions as to what they came out of or how did I remove the coolant.
Bookmarks