The check light on your fridge could be on for a number of reasons including a bad control board, voltage problems, etc. The only way you will know for sure if it is a serious problem or not is to take it in and have it diagnosed by a Certified RV Technician.Click to see full answer. Besides, what does the check light mean on a Dometic RV Fridge?The check light on Dometic Refrigerator comes on and the unit isn’t cooling properly. It is set to Auto mode and the gas is turned off. Any idea what the problem could be? When in auto the gas has to be turned on. When you loose power to it , it switches to gas automatically.Also Know, what does Dometic mean? Dometic is a product brand by Dometic Group. Dometic was established as a brand in the US in 1968 by Electrolux Leisure Appliances, by that time a part of the Electrolux Group. Dometic’s core business is based the invention of absorption technology and its different cooling applications, mainly for the RV industry. Subsequently, question is, how do you troubleshoot a Dometic RV refrigerator? First, a few tips for optimal RV refrigerator operation: Make Sure it’s Level. Make Sure it’s Properly Vented. Keep it Cool. Problem: It runs on propane, but not 110v. Problem: It runs on 110v, but not on propane. Problem: There is a yellow stain on the back of the refrigerator. Problem: Check lights are on. Why Is My RV fridge not working on electric?You need to check for tripped circuit breakers in your RV’s electrical compartment. If you find a tripped circuit breaker, reset it and try running the fridge on electric again. If you have no tripped circuit breakers then my first guess is still that the Electrical Refrigerator Heating Element has gone bad.