I have a Harman P61, 3 years old. It was running great, then the power went out. I turned the stove off. Partially burned pellets in the burn pot. I cleaned out the burn pot. When the power came back on, I turned the stove on. The pot filled to the edge and did not ignite. All the lights are on. Then the feed motor light went off. I emptied the burn pot and shut down. Then restarted the stove and it did the same thing. Any ideas of what I might try? Any suggestions would be very helpful. Thank you.