diff --git a/inventoryManager.lua b/inventoryManager.lua
index ef91819..f765ae7 100644
--- a/inventoryManager.lua
+++ b/inventoryManager.lua
@@ -735,13 +735,36 @@ local function autoSmelt()
 
             -- 1) Pull finished output (slot 3) back to chests
             if contents[SLOT_OUTPUT] then
+                local outputItem = contents[SLOT_OUTPUT]
+                local remaining = outputItem.count
                 for _, chest in ipairs(chests) do
                     local n = furnace.pushItems(chest, SLOT_OUTPUT)
                     if n and n > 0 then
+                        remaining = remaining - n
                         print(string.format("[SMELT] Output %s x%d -> %s",
-                            contents[SLOT_OUTPUT].name, n, chest))
+                            outputItem.name, n, chest))
                         didWork = true
-                        break
+                        if remaining <= 0 then break end
+                    end
+                end
+                if remaining > 0 then
+                    print(string.format("[WARN] Could not move %d %s from %s output (chests full?)",
+                        remaining, outputItem.name, fname))
+                end
+            end
+
+            -- Also check all slots in case output ended up elsewhere
+            -- Some modded furnaces or CC versions may use different slot indices
+            for slot, item in pairs(contents) do
+                if slot ~= SLOT_INPUT and slot ~= SLOT_FUEL and slot ~= SLOT_OUTPUT then
+                    for _, chest in ipairs(chests) do
+                        local n = furnace.pushItems(chest, slot)
+                        if n and n > 0 then
+                            print(string.format("[SMELT] Extra slot %d: %s x%d -> %s",
+                                slot, item.name, n, chest))
+                            didWork = true
+                            break
+                        end
                     end
                 end
             end