i accidentally holed a pipe in a window wall AC unit. Do you know if they can be welded and re- gassed?
Bugger when ya do shiet like that hey, wanna kick your own ass. They can be, possibly, just like an a/c unit or radiator on a car, depends how accessible it is.
Re gas yes, should be able, welding...well depends, if it is al....or hard to get too.....but there are compounds you could prob use in place of welding. Anyway, ask some local ac guys