I have a Harman P61 that I bought new in 1997. It has been running fine up until this year. I have replaced the control panel, the ESP and the distribution blower over its lifetime. I thoroughly clean the stove at least twice a season. I have experimented with different pellets i.e. LG, Matra, La Crete and New England. The problem I am having is that I cannot get much heat out of the stove this season. Running on stove temperature at the max with the temperature and the feed also set to the max, most of the flame stays in the burn pot with some flames reaching up 4 or 5 inches once in a while. The light indicating the feed motor stays on most of the time. If I fill the burn pot with pellets by hand the flames fill the stove and reach to the top. I think this would tell me that the combustion blower is working fine. I think my problem is the feed motor. Anyone else had this problem?