Norcold fridge making weird noises, not be working

Yes, they can be soldered and recharged. But, it has been my experience that if it leaked out once it probably will again from somewhere else. If your handy, I've had luck replacing the cooling unit with a rebuilt one. There are a couple of places on-line that you can get them. Return shipping is part of the exchange deal. In either case, it has to come out.