Norcold Optical Display Board 628974 (fits the N621/ N821) This is the optical display board that fits the N621 and N821 model refrigerators that have a serial number above 9126825. If your refrigerator's serial number is below 9126825, you need: Norcold Board Kit 637779 (click)

View our complete selection of Norcold N811, N821, N841 to find the one that suites your needs.