Staff Answer
Sep 26, 2026 - 09:45 AM
I can't confirm a 637774 board for the N811 from here. The 637779 kit is for the N621/N821. For the N611/N811, the optical board kit (637775) has been discontinued and is no longer available. If the optical board is what's bad, the Norcold N8X is the replacement for the N811.
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.
