Coming from my basement Harman P61.. Not sure what happened but the ash box was FULL of half burnt pellets. It was too hot to mess with this morning but anyone have any idea what could have went wrong? I had just scraped the burn pot Sunday evening and the ash box was about 1/4 full. I was burning Turman pellets. It was a little scary.. It wasn't enough smoke upstairs to set the smoke alarms off but there was a good amount of smoke in the basement (no smoke alarms - think i might put one down there ). It's a daytime basement that is used as a garage so i was able to open up the overhead doors and clear it out pretty fast. My first thought is a super clean and then see how it operates. Its a big mess now.. gooey creosote everywhere... This is a old picture from after I installed it.