diff --git a/machines/iron_furnace.lua b/machines/iron_furnace.lua
index 0f8d400..f21a7dc 100644
--- a/machines/iron_furnace.lua
+++ b/machines/iron_furnace.lua
@@ -173,7 +173,7 @@ ironFurnace.activeOnTimer=function(pos,elapsed)
 		end
 		shouldUpdateFormspec=true
 		shouldRerunTimer=true
-	else
+	elseif meta:get_float("fuelTime")<=0 then
 		minetest.swap_node(pos,{
 			name="industrialtest:iron_furnace",
 			param2=minetest.get_node(pos).param2
@@ -252,7 +252,7 @@ ironFurnace.onMetadataInventoryTake=function(pos,listname,index,stack)
 		meta:set_float("srcTime",-1)
 		meta:set_float("maxSrcTime",0)
 		if meta:get_float("maxFuelTime")>0 then
-			meta:set_string("formspec",ironFurnaceFormspec(meta:get_float("fuelTime")/meta:get_float("maxFuelTime")*100,0))
+			meta:set_string("formspec",ironFurnace.getFormspec(meta:get_float("fuelTime")/meta:get_float("maxFuelTime")*100,0))
 		end
 	elseif listname=="dst" and dstSlot:get_free_space()==0 then
 		minetest.get_node_timer(pos):start(industrialtest.updateDelay)