Staff Answer
Sep 26, 2026 - 07:08 AM
The High Temp Switch 637360 is listed for the 1210 and 2118, and I can't confirm it replaces the 634677 on your 1200. Remember that this switch trips when the boiler overheats, which often means the cooling unit is failing. See our LI OP article. The 1200 is discontinued, and Norcold's replacement is the Norcold N15DCSS. 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.
