Welcome bourgm to irv2.
The two plugs have nothing to do with your fridge operation.
Your control board & inside control on face of fridge are working off 12V 's, you should check your 12v fuse panel for blown fuse or inside your outside vent check for loose wiring where the 12v's feeds the control board.
One plug is for your electric heating elements and the other plug is for the ice maker.
You don't say how old coach is it could be your wiring connectors just need to be cleaned of dirt or corrosion.
Owning a coach would pay off owning a volt meter.
The fuse's on board can than be checked for continuity.
2611 control board