I had the same problem. but i found it not to be the fridge. The water does end up on the floor below the fridge. The problem was the slideout. even when i checked seals around slideout were folded out properly on the sides and top i still got water coming in.
SOLUTION: always have trailer leaning a little bit out of level towards that side of the trailer. and also tilted a little towards front or back. Ive done this ever since and never had the water issue again.
2013 Surveyor Sport SP260
2004 F150 4X4 XLT Supercrew