Ok, day 2 of my first pellet stove, a Harman P61A and I'm thinking something is wrong, a lot of buildup on the burnpot, adding a pic of what it looks like this morning, suggestions please as we have no clue what to do. It is on a feed rate of 3 and Low Room Temperature mode, set to about 65. I don't know if the airflow is wrong or if there is a seal leak or what else to check, my dealer is closed Mondays so no help there. Does anyone know a good way to check the seal? Does anyone even think that's what it could be? Anyone know of another post on here that may help? it's hard because we don't know what to search for, any help is greatly appreciated!!