We purchased a 1994 Astroflamm Pellet Stove last year to heat our house versus the electric baseboard heaters we were using. Set everything up, gave it a good cleaning and it worked flawlessly and put out some major heat. Was able to heat a 2500 sq. ft. house with one 40 pound bag of pellets a day. Went to fire it up this season and the auger motor would not turn, so I ordered a new one and was good to go, or so I thought. This year the stove has been producing a considerable amount of soot compaired to last year with the same brand of hardwood pellets. Additionally it will not throw out the heat like used to or burn the pellets in the burn pot as efficiently. I used to be able to run the stove for 2-3 days and not have to clean the burn pot out as it would expell the ash to the ash pan without issue. Now the ash pot will form an ash cake within 14-16 hours and need turned off and cleaned. I am lighting the stove the same way I did last year by putting pellets in the burn pot, turn the unit on until the auger feed light comes on, turn it off, then use a propane torch to get the pellets going with the door most of the way closed. This year the smoke does not get sucked out as before, but will come out the intake pipe and then start to fill the room with smoke. When I close the door, the pellets sometimes go out, but then ignite, when they are light and it is starting, the flame begins very low like there is not enough air being introduced and then the flame gets very high and you can see smoke/soot at the top of the flames. The back wall also begins to get sooty. I have cleaned the stove several times including the exhaust pipe, behind the back wall, in the smoke chamber, the vent area where the combustion fan is, cleaned the cumbustion fan, installed new combustion fan gasket, installed new exhaust vent sensor and gasket, and tried adjusting the potentiometer for the air and auger speed to no resolve. The stove worked awesome last year and heated our house excellently at a great price, this year it has sucked and I have had to run the backup electric heat, which is rediculously expensive. No one in my area (Harrisburg, PA) deals with these stoves and want over $300 just to come and look at it. I am not sure if the motherboard could have gone bad or if I have a bad combustion fan, which still works the same as what it did last year from what I can tell. Anyone have any ideas?