I drilled a drain hole in my window AC unit and hit a copper refrigerant line. Is it worth fixing?

Yes, as long as the compressor is still good. You'll need sil foss, preferably 15 percent silver, but you can get away with five percent-but you can't use the soft stuff that plumbers use. Can you weld, or braze?

Window units usually don't have refrigerant valves. This is a fine opportunity to install them-and you can either get the self tapping, "self sealing" kind, or you can use the (better if you can weld) stab in kind that require a torch, and some skill.Again. If you can give me more information about the window unit-I might be a better help.

Older window units are typically built better than any of the new ones that I've seen here lately. What's crucial is the question, "is the compressor still good? "I can help you figure that out if you've got a multi-meter(volts, resistance, amps).

Perhaps it makes sense. If you can find someone to replace the copper refrigerant pipe and recharge the refrigerant for less than $200, then, give it a shot.

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