The control panel on my Samsung French Door Refrigerator (RF 4287 HARS / XAA) is not indicating properly. When I adjust the temperatures to my desired value, instead of returning to show the current temperature after 5 seconds, the panel both the freezer and refrigerator indicators display 'OF' on the panel. Is this a problem with the panel or with the refrigerator itself? How do I correct this problem? Thanks, Ron