My wife and I recently purchased a used Whitfield Profile 20 stove. I installed it in our newly renovated front room and we ran it for about a week with no issues. So the wife decided we needed to turn it off as the temps were going to be warm outside and she wanted to clean it. So she cleaned it and we attempted to restart the stove and have had problems ever since. When I brought the stove home I cleaned it thoroughly using my compressor and was outside as it created a huge cloud of ash. I completely blew out every orifice I could get to trying to not have top disassemble the whole stove. I have no issues with taking it apart if need be but wanted to forego doing that until we tested it. So now we have problems. The stove will start up and pellets will load into the Ultragrate it will then fireup but we get a huge flame that covers the entire inside of the combustion chamber. I have completely closed the damper and it has no affect on the size of the flame. Initially tonight when my wife tried lighting it again it had embers glowing in the pot but no fire and there was a lot of smoke inside the combustion chamber. It finally lit off with a small boom as all the smoke combusted. But we had the very large flame and could not adjust it? I took apart the photoeye on top of the pellet hopper and cleaned the eye and the amber glass cover thinking this was the problem. After vacuuming out the whole front of the stove and the ports to the side of the pellet trough I turned the stove on for 2 min. per the manual and then turned it off. The hopper was loading when I went outside to check the flue for excessive ash buildup. When I came back in there was a small flame in the Ultragrate but the stove was still off? So I turned it on and immediately got a large flame that was impossible to adjust and would certainly cause an overtemp shutdown if left on it's own. I am totally stumped and can usually fix anything? Tomorrow I am going to remove the blowers and clean them really good and oil the bearings but I don't think that would cause the current issue. This stove ran perfectly for over a week and now won't run for crap? Why would we get a huge flame in the combustion chamber even with the damper fully closed? Thank you for your assistance.