Mr Vernon insert. It is not calling for autoclean ever. This for obvious reasons makes for a plugged burn pot. Even unplugging the unit to reset it will not call for autoclean. Strangest thing. No other errors reported though I often see the nearly empty hopper icon on the display but the hopper is no empty. At a loss what to check. It will do startup, feed pellets, ignite and run just fine but the flame gets weak as the pot is plugging up.