Hi Galena
My brewfridge was second-hand, and of unknown age/use before I got it but has been out in my (unheated) garage for 4-5 years now ... it's not really designed for out-of-doors use, and after the first heavy winter it was noticeable how it was no longer able to crash-chill to quite as cold (down to around 4-4.5C at best, but that's cool enough to get yeast to drop) and other than that it's been fine for controlling fermentation temperatures
Weirdly, it's better at chilling cooler in the summer ... it can be freezing temps out and the fridge won't get 5 gals of beer down below 4C ... but when its high 20sC ambient, the fridge will happily chill down to 1-2C
Cheers, PhilB