I plugged a heater in the cabin GFI outlet above the fridge. (Same as every year) When I got back to the boat the GFI outlet would not reset. Not even click. The cover even look a bit burned. I replaced the outlet with a new GFI but the same thing is happening. There is a green light on the new outlet but the reset button will not even click on. There are two other non-GFI outlets I'm aware of on the boat and none of them are working. The electrical panel is showing on. The battery charger and hot water heater are working. The switch on the panel for the outlets is combined with the refrigerator. The refrigerator's AC is working. Any ideas on what to do next?