Cutter, I had a similar problem in 2008 when my Channing iii was first installed. When the installer came back he replaced the auto heat box because he said sometimes Alaska has had a problem with calibration of the boxes and he also checked the draft. My stove would light ok but then it would burn towards the back and go out. The installation/owners manual says that "generally a 1 will maintain a minimum fire". A setting of less than 1 may cause your fire to go out. Come to think of it he never said if it was the auto heat box or the draft but it has been running fine since, except when I had not cleaned out the fines from under the grate, there's a easier way to do that without removing the grate. Another member told me how to clean out the fines by removing the air motor tray, sounds a lot harder than it is and you don't have to mess with removing the grate which is a pain.