Well after reading numerous threads the last few days about the quad castile not getting enough air to the pot and pellets not burning fast enough which is building up in the pot, I decided to address this issue all at once because it's happening to me as well. I am replacing the combustion blower and the gasket, fire pot gasket, the door gasket, and updating my vent pipe to Simpson dura pellet vent pro from pellet vent. Plus a very good cleaning. I'm pretty sure the combustion blower is the original from 2004. Now I am deciding on a OAK. Here some pics.Luckily we have a stretch of warm weather (60's) this week here in North Tx.