Got a used Beneteau 361 with a top loading fridge/freezer and a front door fridge, both of which quickly chill and actually freeze. Doesn't matter what I set the temp control at. And the incoming feeder lines are frosting up. To control the temp, I manually turn electric on and off. When off, lines thaw and create puddles at base of wooden cabinets. Any ideas on what is wrong and how to fix?