Dometic Fridge Hard to Regulate when Traveling

Outside, there is a door panel that is the back of the refrigerator. Inside you will find the controls, and a gas burner. When you switch the control to gas, the burner should light. The flame is hard to see as it is inside the burner, but you can hear it. If you have an RV friend, get them to show it to you. From what you say, sounds like it is not lighting the burner, why is a different question. A good RV service person might be the best thing.