Staff Answer
Sep 27, 2026 - 11:36 AM
If the thermostat turns it on and off but doesn't control the temperature, it's failing. I can't confirm the right thermostat for the DE-490. The 605505420 isn't listed for it.
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.
