Staff Answer
Sep 26, 2026 - 09:48 AM
The 628974 is for N621/N821 fridges with a serial number above 9126825. Those units already have the newer power board, so only the front panel is needed. Below that serial, the old power and optical boards have to be replaced as a matched pair, so they come together in the 637779 kit. Both are discontinued.
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.
