So for those following along, found something interesting today. Took to a mates shop and we discovered the fridge has 6v supply only. At the house fuse box, the top rail of the fuses has 13v and the bottom 6v. IE, top of the fuse blade 13v, bottom of the blade 6. There is a 3v fuse blade with a symbol above it like a flame picture, that blade has the red indicator lamp lit, as if it's blown. But it's not blown. So the fellow suggested there's a problem in the house fuse panel itself or a damaged wire on the house batteries side of the supply or something damaged and a 6v back flow from a capacitor or something. House batteries are both fine and registered 13v. It's just weird that the fridge is only getting 6v. Anyone have any ideas? Thank you. Heidi.