Java Edition:Invalid Item in Blast Furnace Slot

InvalidBlastFurnace.png

Invalid Item in Blast Furnace Slot
A blast furnace with popped chorus fruit in the output slot
Type	Block
Version Preparation
Pre-downgrade Range	18w50a
Post-downgrade Range	18w44a - 18w49a
Versions Obtainable
Version range	20w06a - 20w12a

Only fuel or a single bucket are permitted in the fuel slot of a blast furnace. Additionally, nothing can be placed in the output slot of a blast furnace, meaning that only items that are a result of a smelting recipe can go into that slot. Several methods allow different items to go into these slots.

Obtaining

Furnace Output Items

Warning: Downgrading 

This feature uses downgrading which can result in crashes, data loss, or corruption, and requires specific versions. Follow the page instructions carefully.

18w50a is the first version where blast furnaces have functionality. Any item can be placed in the smelting slot, and only fuel can be placed in the fuel slot. However, only ore based recipes work in blast furnaces. By downgrading a blast furnace to 18w49a, the smelting process will occur if it is a valid furnace recipe. This allows for any furnace recipe output item in the output slot of a blast furnace. This same method can be used to obtain invalid items in smoker output slots.

Collapsed content

Input Item Output Item Black Terracotta Black Glazed Terracotta Block of Quartz Smooth Quartz Block Blue Terracotta Blue Glazed Terracotta Brown Terracotta Brown Glazed Terracotta Cactus Green Dye Chorus Fruit Popped Chorus Fruit Clay Ball Brick Clay Block Terracotta Cobblestone Stone Cyan Terracotta Cyan Glazed Terracotta Gray Terracotta Gray Glazed Terracotta Green Terracotta Green Glazed Terracotta Kelp Dried Kelp Light Blue Terracotta Light Blue Glazed Terracotta Light Gray Terracotta Light Gray Glazed Terracotta Lime Terracotta Lime Glazed Terracotta Magenta Terracotta Magenta Glazed Terracotta Netherrack Nether Bricks Orange Terracotta Orange Glazed Terracotta Pink Terracotta Pink Glazed Terracotta Potato Baked Potato Purple Terracotta Purple Glazed Terracotta Raw Beef Steak Raw Chicken Cooked Chicken Raw Cod Cooked Cod Raw Mutton Cooked Mutton Raw Porkchop Cooked Porkchop Raw Rabbit Cooked Rabbit Raw Salmon Cooked Salmon Red Sandstone Smooth Red Sandstone Red Terracotta Red Glazed Terracotta Sand Glass Sandstone Smooth Sandstone Sea Pickle Lime Dye Stone Smooth Stone Stone Bricks Cracked Stone Bricks Wet Sponge Sponge White Terracotta White Glazed Terracotta Wood Charcoal Yellow Terracotta Yellow Glazed Terracotta

Warped/Crimson Fuel

From 20w06a to 20w12a, you could use crimson/warped stairs, doors, planks, slabs, buttons, trapdoors, pressure plates, and signs (20w09a+) could be used as fuel. This bug was fixed in 20w13a. This is the only method that allows you to get these specific items in the fuel slot of a blast furnace. This same method can be used to obtain invalid items in smoker output slots and furnace output slots.

See also

• Invalid Item in Armor Slot
• Invalid Item in Brewing Stand Slot
• Invalid Item in Furnace Slot
• Invalid Item in Smoker Slot