I forgot to mention, some fridges have a delay in switching from 12v back to gas. I believe this is for safety when filling up with fuel, so it's not lighting the pilot light immediately after turning the engine off. This is likely what it is.Thanks Nigel, I didn’t think about the fridge. That is probably the answer. It is only for a few minutes so no real problem. It’s a pain to check though because with the tech tower the door has to be open for so long to check the energy source.