Staff Answer
Sep 24, 2026 - 10:17 PM
"no CO" means the fridge has detected that it isn't cooling properly, and replacing the control board rarely fixes it. It usually points to the cooling unit, the heat source (heater or burner), or poor ventilation. Read our post on Norcold no CO and our guide on RV refrigerator not cooling before buying a board. 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.
