My Dec-2015 Samsung French door mullion bottom hinge broke. I ordered 3 replacement hinges, just in case. I followed YouTube video to dissemble mullion and replaced the bottom hinge. I also used spray silicon on each of the 3 hinges (especially bottom that has the spring that flips mullion into open and closed position). Take your time disassembling mullion as the insert/frame assembly and defrost foil must remain undamaged. For my model the entire frame needed to come off, so I didn’t need to remove the insert (found out after everything was apart).