Staff Answer
Sep 27, 2026 - 06:19 PM
The 621270001 board is discontinued, and new ones rarely come with a wiring sheet. The connectors are keyed and the terminals are labeled on the board, so match each wire to the same position it had on the old board. Taking a photo of the old board before you remove anything helps a lot. If you've already taken the old one off, email info@rvfridgeguys.com and we'll help you match it up. For the future, the Dinosaur 6212XX is the replacement board for the N640.3 (serials below 8938727), and it comes with instructions.
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.
