A little late in replying but it sounds like your auger may be feeding too many pellets. The 4 setting is a good place to be. I lowered raised mine to 6 one time and I had the same issue. Change the setting to 2 and see what happens. You will not get as much smoke on a 2 P setting but it will you know if it is overfeeding pellets. If that is the case something is wired backwards.