Insert not burning pellets completely

[Drobin]

Hey Guys
I have a 1994 Harman Invincible Insert. It was working great for about two weeks. I cleaned the burn pot pretty good but still not burning the pellets fully. I adjusted the feed to lowest setting, still no good.
I'm a newbie and love the stove but need specific advice if anyone could help me trouble shoot. Thanks

 

[DAKSY]

I'm not totally familiar with your unit, but sounds like the fines box (if there is one)
is either partially blocked or the cover may not be sealed. My P43 did this when the
gasket on the fines box cover failed.

 

[Drobin]

Thanks
I'll see if I have a fines box, I also noticed the door handle needed to be tightened for a tighter seal. I'm testing that now

 

[corkman]

I'm not totally familiar with your unit, but sounds like the fines box (if there is one)
is either partially blocked or the cover may not be sealed. My P43 did this when the
gasket on the fines box cover failed.

What was the fix for this Dasky. Did you have to get a new cover or can just the gasket be replaced

 

[DAKSY]

Unfortunately, I had to buy BOTH the cover & the gasket.
I kept the old ones & will attempt to buy new gasket material
if & when this one fails. Unfortunately, it failed about three years
ago & I don't remember exactly how much it was...
$50 -$75 I think...