Question

Freezer & fridge over freeze ,won't light on gas & fridge freezes even when not on 240v until the batteries go flat, the fridge even freezes when of at control panel, dometic C40/110 model number RM7655L

Answer

You need to get the fridge serviced at an Approved Workshop and have them check the wiring of the vehicle. The fridge should only be connected to the battery when the vehicle is in motion.