Staff Answer
Sep 28, 2026 - 06:32 AM
With serial 905127, your N621 is below 9126825, so it takes the 637779 board kit. That kit is discontinued now. If your boards have failed, the Norcold N7X is the replacement fridge for the N621.
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.
