I have a Dansons pelpro 120
All of a sudden the heat output dropped considerably.
I had it serviced, put in a new convection and combustion fan.
When the combustion fan was installed I received one night of good heat output and the next morning I was back where I started. No heat output. I did the door gasket test and I couldn’t find any leaks.
I brought in a number of bags of fuel and opened them in my living room and let them sit for five days. The window gets fogged up shortly after I clean it.
To get a good flame I have to close the damper enough so that the burn pot ends up clogged after a while. Even then the heat output is poor.
The name of the pellets is Green Supreme.
This thing is driving me crazy.

HELP

Oh, I forgot. The stove will run with the damper all the way open. No popcorning.
I never had this much trouble when I was heating with oil.

Which grade of Green Supreme, I believe there is atleast two. Also, where did you buy them? I bought some Green Supreme Premium from Lowe's in October to try. These bags were stored outside and handled roughly. On the lowest setting, with OAK installed, I still had to adjust my manual draft open 2 inches to keep the burnpot from filling with ash. I would suggest trying a premium or super premium pellets. In NY, some areas now have access to Dry Creek Super Premium, $280-$300/ton, but I have heard they burn HOT AND CLEAN!