Norcold fridge..green light blinking every ten seconds or so

Bob, I think this is a standard absorption fridge that runs on 120 or gas. It "runs" on gas but needs battery power to operate the board and the spark to ignite the gas when needed. Years ago there were 12 volt fridges and I am assuming this is not what he has. Today they have electric only fridges but since this is a gas/electric fridge, he doesn't have one of those either.