Replace your refrigerator's power board with Norcold's 633280 Refrigerator Power Board Kit with Control Adapters. This kit includes the new style lower power board that goes in the back of the refrigerator, adapters and the new optical display board. The kit is compatible with Norcold 3-Way refrigerator models that possess a power board that is no longer being manufactured. Norcold 3-Way refrigerator models N410.3, N412.3, N510.3 and N512.3 will need Norcold Refrigerator Power Board Kit with Control Adapters number 633291. Refer to manufacturer recommendations to ensure proper fit and usage.