I have a RM 2551 in my 2011 23fb. On the last two trips of the season I noticed the frig wouldn't run on gas while traveling. The pilot light on my frig comes on immediately, but the spark electrode keeps sparking for a minute or so till the gas shuts off. It will go through this cycle 3 times before the check engine light comes on. I'm now trying to get it fixed before spring. After some research it seems like the steps are 1) to clean the burner, flue, etc. then 2) replace thermocouple then 3) new control board. So first stop is the manual. I know product manuals can be less than perfect, but according to the diagrams in the manual there should be a thermocouple which as I understand tells the control board the flame is lite? See photo attached. Am I missing something?