I just ran into an unusual problem with my fridge. I just finished remodeling her in the last month and still getting to know how she operates. Unfortunately my firebox door does not seal perfectly. there are a few small gaps that I plan on fixing next week. I have a 1.5" ball valve for air intake as well as 2 small 3/4" valves on each side for my guru fans. I have my firebox setup to burn the "s" pattern. I would dump two lit chimneys on one side after I preheat with weed burner. temp would get to 250 but as soon as I close the door the temp would drop. this is with all dampers open. If I leave door open or slightly cracked the temp would shoot up past my target of 250 which is expected. Here is where I am thrown tho. when I went to shut it down last night I closed all air dampers and had firebox door closed. After about 5 minutes of everything being shut down the temp started rising and went all the way to 370* and stayed there for 2 hours. I am no expert on how air moves but this is weird.