How old is it and what condition is it in?
Ulines, even though they are sold as marine units, typically start rusting when within 1 mile of the boat they're going to be installed on.
If recent, it maybe worth fixing. Start by checking the fan, they are known to fail.
If you have to replace, try to find another brand that will fit in the hole. Unfortunately, if you re talking about the combo ice maker /fridge, the dimensions are odd that nothing will fit. Uline has you by the you know what at $1600 list price. I replace these every three years on t boat I run, best I ve found for two was about $1250 a piece.
While the concept of these is good, the problem is that no matter how low the setting it will freeze drinks put in the door, resulting in cans or bottle popping.
I hate them!!!