Staff Answer
Sep 26, 2026 - 08:44 AM
For the N611 (not a V model), the 621988 was replaced by the 637775 optical board kit, but Norcold has since discontinued that kit too, and it's no longer available. If the optical board is what's failed, the fix is to replace the fridge. The Norcold N7X is the exact replacement for the N611, with the same cutout. More in our replacement guide.
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.
