Harman XXV pellet stove vent blockage
Our Harman XXV pellet stove began burning oddly (large, slow burning flames) and smelled pretty bad. I assumed it was lack of air so I checked the vent outside. The screen was nearly completed covered with soot and I cleaned it. Immediately it began to burn normally again.
I'm concerned as to why the screen became clogged to begin with (we've had the stove for 3 years and this has never happened) and if I should be concerned about more blockage somewhere along the entire vent.
Any advice? Should I clean the entire vent? Thank you.