Staff Answer
Sep 24, 2026 - 10:08 PM
"no CO" means the fridge has detected that it isn't cooling properly, so a new thermistor usually won't fix it, and a new control board rarely does either. The code usually points to the cooling unit, the heat source (heater or burner), or poor ventilation. Before buying a board, read our post on Norcold no CO and our guide on RV refrigerator not cooling. Our tech support service can help you figure out which it is. If you have any questions, just reach out at info@rvfridgeguys.com or call us at 800-712-8822. You can find everything we carry at www.rvfridgeguys.com.
