I have an old (1940s) freezer in the basement. I turned it on and it works! At least, the motor runs and there is some pressure in the coolant line, judging by the hissing noise.
I want to use this freezer for a rather strange purpose I won’t go into; suffice to say I can’t use the freezer in our fridge. Tittilating, no?
So what do I do? There is surely not enough coolant in it. I can’t top it off with freon, which I’m sure was the original coolant. I need to do two things: (1) Drain any remaining freon and dispose of it in an environmentally responsible way, and (2) Put in whatever the modern replacement for freon is.
i’m not sure about in a freezer, but say the ac on a car. in a car, the replacement for freon is something like rs232 or 220, something like that. im sure i butchered it. but to switch over to that coolant in a car pretty much requires replacing the whole ac system, compressor, etc…
Your fridge does NOT run on the same stuff that your car does! The fridge probably uses something ammonia based.
That stuff compresses differently that freon or r-134a (the new refrigerant) Needless to say, you can’t just hop out and retrofit it with stuff from Autozone or NAPA.
I’d get someone expierenced to look at it, just to be safe.