napoleon npi45 HELP!! lazy flame, soot on glass

[dtauger82]

If anyone can offer some guidance I would greatly appreciate it. I have a napoleon pellet insert. My problem is black soot on glass and a lazy flame, the pellets build up in pot too. I have changed all gaskets, replaced the exhaust blower, vacuum switch, new door gasket, control board, tried a 3" and 4" liner, added a fresh air intake, tried about 10 different premium pellets.....NOTHING. I have also adjusted the trim levels, feed rate and combustion speed... nothing. Oh, and I've cleaned it top to bottom several times... please anyone help!!

 

[SidecarFlip]

dirty flue if the liner don't go all the way up?

 

[fevest]

something not right with your flue pipe. not moving enough exhaust

 

[Don2222]

You may need an upgraded high current exhaust blower with large petal impeller blades. I put one in an NPI-40 and it worked super all this past winter!
Just google "low drafter blower"