Staff Answer
Sep 25, 2026 - 06:49 AM
We don't have a diagram to post. The thermistor clips onto the evaporator fins inside the fresh food compartment. If it has been moved, the fridge will run too warm or too cold. Moving it on the fins is a common way to fine-tune the temperature. See our quick thermistor test article and too cold in refrigerator page. The Thermistor Assembly 618548 has been discontinued by Norcold and replaced by the in-stock Thermistor 636658/621742. The N811 fridge is discontinued too, and Norcold's replacement is the Norcold N8X. 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.
