without finding out if it leaks
is not money
well spent if it leaks
all the coolant
again. I would first identify what part of the fridge is actually running. If it's not the compressor then it's dead. The fans often out last the compressor. You'll need to pull it out to really check it out in any case.
Once in a while a closer look revels details that explain the previously unknown. The "Oh now I see why" moment - priceless. It is better than tearing a head
apart. There can be a bright side if you look for it.
Best just to relax - you are on the boat!