I have a Winston pellet stove that has a computer thermostat...probably why that company isnt around. The thing doesnt seem to go into the high burn mode ie the feed rate isnt suffiecient. It is thoroughly cleaned out. The feed rate is controlled by the thermostat not directly by the burn setting when it goes into the high burn it usually starts flashing red on the indicator light and shuts down instead of resuming in the low burn. The low burn mode burns okay.