Staff Answer
Sep 25, 2026 - 12:58 PM
For the N621, the Board Kit 637779 is listed for your model, but it has been discontinued by Norcold, so it's only available while our remaining stock lasts. The in-stock options are the 628661 and the Dinosaur 6212XX. The N621 is discontinued, and Norcold's replacement is the Norcold N7X. See our Norcold replacement guide.
Since I can't confirm this 100% from here, please email us at info@rvfridgeguys.com or call 800-712-8822 with your model and serial number and we'll double-check it for you. You can also browse www.rvfridgeguys.com.
