Staff Answer
Sep 24, 2026 - 10:16 PM
Unfortunately, the boards for an N641.3 with that serial number have all been discontinued, including the 633287 and 3-way 633280 board kits and the 628976/ 637780 optical board. Before replacing it, confirm the optical board is really the problem. Our troubleshooting guide can help. 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.
