Staff Answer
Sep 28, 2026 - 06:18 AM
With serial 857158, your N621 is below 9126825. The 637779 kit replaces both the power board and the optical board as a matched pair, and that's what's needed for your serial range. The 632168001 was the power board alone. Both are discontinued now. If the gas shuts off right after lighting, check the electrode first. The 61692222 spark sense electrode fits the N621 and is in stock, and a dirty or misaligned electrode is the most common cause.
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.
