Staff Answer
Sep 25, 2026 - 07:43 AM
Good news: the Norcold/Dometic Interrupter 621737 is in stock right now. The N300 itself is discontinued, and Norcold's replacement is the Norcold N4150. See our Norcold replacement guide.
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.
