Harman P43 question

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HeatP43

New Member
Jan 4, 2017
1
Vermont
I have a Harman P43 in the home I am renting. I have never had a pellet stove before and I am having a couple issues with it. The first one is that the combustion fan will sometimes go on and off several times at the end of a cycle (running in room mode). I understand that it is supposed to keep running until the fire is completely out but it will shut off for a minute or so then come back on for a minute, then off again, etc. What would cause this? I have looked through the manual but it didn't help.
In addition to that, lately when I clean the burn pot out I am finding pellets that are not completely burned. I turned the feed down to #3 but it didn't seem to make a difference. Also the glass gets super black and sooty just days after I clean it. What am I doing wrong?