I cleaned the stove thoroughly yesterday and installed a new door gasket. Last year the flamed burned to one side and after inspecting the door I could see there was a small gap in the gasket. But, the stove burned okay otherwise. Started it up yesterday and initially it burned beautifully. Low hot yellow flame, nice heat output. That was on a half bag of last year's pellets. Then I added new Green Supreme. The flame got really high so I lowered the load rate. There was a lot of sparking initially. With less feed, there is little fire and it seems that when the pellets drop it is so hot they just explode so I have virtually no flame but plenty of heat. However, clearly they are not burning. It seems there is too much vacuum or intake air but I don't see a damper or adjustment either on my stove or listed in the manual. Not sure what to do, half a bag of pellets overnight in 30 degree temps outside seems a bit much, and only set the temp to 67 degrees for the stove. It got so hot I got three small cracks in the door glass during the night. I shut it off this morning and checked the stove for ash and there is virtually none in the pot or catch tray but the glass is complete coated already. Not sure what to do.