Staff Answer
Sep 24, 2026 - 10:09 PM
The 8663 is an older model, and I can't confirm which thermistor it takes without checking. The 636658/ 621742/ 50665 thermistor fits most Norcold absorption models, but send us your serial number and a photo of your current thermistor and its plug so we can confirm it fits the 8663. For the 8663's power board, see the Dinosaur 61565022. 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.
