Just in case anyone is still subscribed to this thread...
I got the problem fixed, sorta. Due to some planned boondocking in the near future, we wanted the gas function of the fridge to work, so I took it to the local RV dealer / service provider. He diagnosed the issue as a bad igniter card but due to the age of the fridge + where the card is located (required fridge to be completely removed to access the card at the bottom, FRONT) he said that IF the card was available, I was looking at min $200. He came up with an alternative after talking to Dometic, though. I don't understand it all, but once the fridge is fired on gas, it is possible to disconnect the 12V
supply and it will continue running so long as the flame doesn't blow out. Therefore, the serviceman installed a little toggle switch on the side of the cabinets in the kitchen where I can manually turn off the igniter. So far, it works great. Once it's lit and running, I turn of the toggle.