I've had my older (bought used) Traditions stove for 4 winters and I'm having a problem with partially burned pellets accumulating in the pot, choking out air flow, and eventually causing an error and the stove shuts down; I'm hesitant to leave it on when I'm gone. The stove lights harder than I remember and the window is sooting up much faster. I do not believe my draft is working as it should and I was hoping someone could provide a diagram of the airflow for this stove; neither the owners manual or service manual have any information. When I close my draft I get a lazy flame and as soon as I open my draft 1 notch the flame is active but once I move it past the 3rd notch, about 1/3 open, I get no change in flame intensity. With my 2 yr old Breckwell stove I can blow pellets out of the burn pot if I open the draft up all the way. I called Lennox tech reps and they said there should be a change in draft for all positions but did not provide me any other info other than call a rep in the area for troubleshooting. I live rural so as soon as someone gets in their rig the charges start. But I've also read that these stoves have a poor air flow design. What I have done: Inspected and cleaned the 12' of 3 1/2 pipe which has 1 90 deg elbow. Replaced the door gasket and checked seal. Replaced the window gasket and ensured window wash gap at the top is correct. Attached my shop vac to the Exhaust motor and I was able to feel air movement in the left and right voids in the upper portion of the fire box; I'm assuming that is where the exhaust flows and provides the draw for the draft. I don't feel the same air movement just using the exhaust motor but of course the door is open. I do feel air movement through the exhaust motor when when I start up the stove, before combustion as a test. I do not own an air movement meter. Visually inspected the motors to see that they are both running when the stove it running. I have to perform routine maintenance more frequently than previous years to keep the pot burning clean. Sometimes it will accumulate a mass of partially burned pellets in the pot right after I've cleaned everything so the problem is intermittent. I took my stove off the wall thermostat so I can control shutdown and start up and we're pretty much running it 24-7 now unless we're gone for the day. I thought it might be the pellets, Coastal Farms Premium, but it doesn't seem to matter which brand of pellets I'm burning. I've read the permanant sticky at the beginning of this forum and read the few posts about this stove on this site. Any other thoughts are appreciated.