Staff Answer
Sep 25, 2026 - 01:56 PM
The Thermostat 639866/639857 is listed for the DE0041/DE0061, and I can't confirm it fits your DC558 (serial before 28337986). It has also been discontinued by Norcold. The DC558 is discontinued too. The closest current Norcold DC model is the Norcold N2175. 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.
