I think there is a 5amp fuse at the back of the fridge.... you get to it through the outside vent/door cover. At the back of the fridge (on the left) is a black plastic box. Inside that is where the 5 amp fuse is.
But FIRST... CHECK FOR an Ammonia smell and for YELLOW POWDER ON THE FLOOR AND AROUND THE WIRING... If the cooling unit leaked there's nothing you can do to get the fridge to work. You'll have to replace the cooling unit or the entire fridge.
Trying to switch from electric power to LP (again and again and again...can cause the LP to build up and then if the cooling unit is leaking...and the LP gets a spark... a flame can shoot over to the leak... and could cause a fire. (ask me how I know)
Kathy