I did a 12 hour cook on my FEC-100 at 224 degrees until the meat hit a target temp. I then dropped the cook temp to 140 on the IQ4 controller. There it stayed within several degrees of 140 until I turned it off after 2 hours. I pulled the meat and shut the door for the unit to cool. Coming out 3 hours later I noticed smoke coming out of the chimney. (An elbow and 5 feet of vertical stack) Opening the door it was still warm with smoke. Then I noticed the pellet bin was smoking. Feeling the pellets they were warm and got hotter the further down I put my hand. I emptied the bin onto the snow and found the bottom 3 inches of pellets were black and smoldering. I finished digging out what I could and tuned on the smoker to feed the rest of the pellets into the firebox where they finished burning.
This is a 2 month old smoker with the ramp and there was no wind or reason to expect this. Anyone else see this before?