when I went to light the stove pellets would not stop feeding and would choke out the fire. I sent for a new control board and when I took out the old one I noticed the 6 prong white plug was half out. I plugged it in and had the same results. I noticed a humming sound and the smoke from the choked fire would not be blown out. so I took out the ash pan turned the wheel on the fan and it was slightly stuck. It freed easily and I spun it by hand both ways plugged the stove in and it lit and is running perfect with the old control board. fan seized over the 6 months the stove was off so remember this if you have a similar problem