TWO DAYS AFTER PURCHASING THIS USED 2017 FUSE, THE AUTOMATIC TRANSFER SWITCH FAILED. SMOKE WAS COMING FROM THE ELECTRICAL COMPARTMENT. WE DROVE BACK TO THE DEALER IN LINCOLN NEBRASKA. THE ATS WAS REPLACED. THE NEXT TIME WE PLUGGED INTO SHORE POWER, THE ATS WORKED FOR A FEW HOURS, AND FAILED AGAIN. WE ARE WAITING TO HEAR BACK FROM THE DEALER. IF WE HAD NOT BEEN WITH THE UNIT, THERE COULD HAVE BEEN A HUGE FIRE! THE VEHICLE WAS STATIONARY AND PARKED IN A LEVEL SPOT WITH GREAT CLEARANCE AND AIR FLOW AROUND IT.