Bought Accentra insert in Sept 2007, 2 heating seasons with no problems .. this is the problem. It had a lazy flame every 15 minutes and would shut down for a minute and restart. , I totally cleaned it ... about 5 times. Chimney is clean .. today replaced the esp ... when I reconnected the power the fans started and the chamber began to fill with pellets, it was in the off position. Local dealer said it had to cycle through for 15 minutes but after an hour it would not shut off so it continued to fill with pellets to overflowing. No ignition so no flame but it was in the OFF position. I called the dealer and they said they could come out in a week .... I've been struggling with it for about a month and finally they gave me the new sensor today. OK any suggestions .. the current problem never occured before ... just turning on and off before. Now it won't shut off even when its in the off mode. Any ideas ... thanks ..