Re: removing air conditionar (everything)
as said above, the gas will give you cold burns for one if you are not careful, and for 2 needs to be done in a big open space, it smells and can make you sick and light headed.
After its all out, the rest is very simple stuff, pending how well it goes.
I did put something here, but it vanshied, I think
"So long and thanks for all the fish!"