continued to run first fire and ran fine and ran it in stove mode and set at 3 ran good for 1 hour exactly and started shut down and 6 blink code on board , turned stove/room heat knob to stop and back to stove heat and auger and fan started back into cycle and ran 1 more hour and same condition , 6 blinks from status and shutting down . when I did allow it to burn down and finish the shutdown distribution fan stayed on low and chamber fan stayed on full a nd both never shut down even when stove cold - I unplugged I did notice the burn even on low was very warm and it seems to walk slightly upward of the setting instead of staying a small burn at 2 , . thanks for your imput