Amana Distinction side by side

Question

Ice machine quit working several months ago .. water doesn't make it to the machine it just flows right out of the bottom. I've tried to trace the line into the guts of the fridge but I can't find any wetness so I cannot determine where the water is coming from. Now the freezer and fridge are not cooling. I have a build up of frost on the lower part of the freezer but it won't get cold enough to create ice cubes. I have cleaned the front and back vents to make sure dust isn't impeding air flow but that doesn't seem to be the problem either ... HELP Thanks, JHampton