Minecraft wiki entry for Furniture, associated text: To set up this fridge, make 2 wide and 3 tall rectangles out of the iron. Make sure it is against a wall and in a corner. On the side facing into the corner, cut out the walls and place the sticky pistons, setting up Redstone torches appropriately as inverters to the pistons. Then, attach the lever to the 2nd block up on the non-piston-attached side. Wire this lever into the piston inverters, and voila, a working fridge. inside the fridge, place an iron block in the middle, a stone slab as the roof, and put a chest in the top space. At the bottom, put a block of ice in as a sort of "freezer."