I think a freon tube is punctured though I haven't turned it on yet. I'm wondering if it could be used for a fermentation chamber or anything.? Without a cooling ability?
I've got a few dorm ones from college that don't work so I use as them as beer vaults or for conditioning bottles at ambient temperatures. Seems to help balance out the days where the temperature gets way too high.
If it's big enough to hold a fermenter then add a heating pad and a temperature controller and you've got a winter-time fermentation chamber.