Adam B Oak Island , NC June 30, 2026 Appliance: Samsung Electric Range NE59N6630SS/AA-00 Samsung Range Ne59n6630ss/Aa-00: C 21 error code on my samsung oven. How to replace Electric Range Control Board Assembly. Removed the back cover plates from the oven and replaced the control board…done. Easy! Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes