


If the fuel has been exhausted (and the fuel gauge is empty) when an item has been partly smelted, the smelting progress is undone at double speed and the item remains in the input stack. If smelting stops while a fuel item is still burning (a normal occurrence), the furnace continues to run visually but no more input items are processed. The furnace block itself may not be dropped if it was destroyed by an explosion. The currently-burning fuel item is lost since it is removed from the fuel slot before burning begins. The furnace is broken: The contents of all the slots, any accumulated experience, and the furnace itself are dropped.If a fuel item burns out in this condition, a new one is not used until the output slot is again available. In this case, smelting (but not fuel consumption) is paused until the output slot becomes available (usually because items were removed by either a player or a hopper).
#1.8.9 ZOMBIE DROP IRON INGOT FULL#

(The player can still tell when a furnace is working by its block texture showing flames and fire particle effects appearing.) The furnace then begins to smelt and continues even after the player closes the interface. To smelt, an input item and fuel must be placed into the input and fuel slots, respectively. Flames above the fuel slot act as a gauge showing the gradual consumption of the current fuel item, and an arrow in the middle gradually fills to show the progress of smelting the current input item. The furnace, blast furnace, and smoker share a similar interface: At the upper left is a slot for smeltable item input, below that is a slot for fuel input, and on the right is a slot where output items accumulate and can be removed by the player.
