Mark M Cincinnati , OH August 08, 2017 Appliance: Samsung Refrigerator RF4287HARS/XAA-0000 Samsung Refrigerator Rf4287hars/Xaa-0000: Ice maker wasn't working. How to replace Refrigerator Main Control Board Assembly. I had replaced the original ice maker unit with a new one and it only worked for a couple of days. So Today, I replaced the Control Board. Took all of 15-20 minutes from start to finish. now the ice is dropping every couple of hours! 5 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes