My Dometic refer has been flawless for 8 years. Same controls as yours. I have to assume one of two things. Either you have a LED burned out or your on gas only? When i turn mine on it initially looks for electricity to run. If its not present it switches to gas and the display indicates what is being used for a heat source. Not sure what you mean by the off/on control position is so small. It is afterall only a push button on/off. The other button in your picture is fuel source selection. Auto/gas only. Set that switch to auto and leave it alone unless you are running a generator while boon docking. Then switch to gas only.
