We have had our pellet stove for about 4 hrs now. It has ran perfectly. We did a deep clean on it to get ready for winter about a month ago. We started it last week and it has been fine. I started it today and it started perfectly as usual with a nice big flame, then about 30min later it started beeping and the burn pot was overflowing and the flame was out. I’m not sure what is wrong since it started normally.