Staff Answer
Sep 28, 2026 - 07:41 AM
With serial 690577, your N621 is below 9126825, so it takes the 637779 kit, which replaces both boards and includes adapters. That's why a replacement board looks different. The 632168001 and the kit are both discontinued now. If the board has failed, the Norcold N7X is the replacement fridge.
If you have any questions, just reach out at info@rvfridgeguys.com or call us at 800-712-8822. You can find everything we carry at www.rvfridgeguys.com.
