Ran the stove from 5 pm until 1-2 in morning when my wife said it shut off. Running heat 3 blower on 4. Let it cool down restarted it and shut off again about 6 oclock when i left for work. Before the second relite i opened the damper more to allow more air thru.. Both times the burn pot was empty. Burnning Inferno's. I think it is the high limit switch but IDK. any help would be appreciated.