Staff Answer
Sep 25, 2026 - 07:01 AM
We can likely help, but we'd need your model number. Norcold used several different thermistors on their marine fridges. The Thermistor Assembly 618548 has been discontinued by Norcold and replaced by the Norcold Thermistor 636658/621742, which is in stock. You can see all our thermistors on the Norcold thermistors page, and if your fridge itself is an older discontinued model, our Norcold replacement guide lists the current replacements.
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.
