when mine was in the boat, it was water cooled.. When the evaporator holed through, I removed the whole thing.. my ex wife hit the nail on the head when she said "You can look at ice and know that it is working." I had tried several "fixes" of the evaporator and our refrig had gotten undependable. I may repair and re-install one day(?) but on the short cruises I have been doing, ice works well enough.