Symptoms: Lazy flame, pellet buildups in the burn pot, and dark black ash or soot on the glass are clear indications of limited airflow.
Resolution: This video demonstrates the airflow circuit, and why it is important:
Cause: There are two main problems that lead to limited airflow.
1) Negative pressure leakage - This is where the stove is drawing air incorrectly. Instead of pulling air through the pellets, it is pulling air around them. Common places where this occurs is
- The bottom ash pan drawer - make sure that both side latches are snug and have even pressure.
- The burn pot itself - Make sure that the burn pot sits completely flush on the cradle. (this is very important) You want to avoid gaps around the bottom of the pot where air could spill out around the pellets instead of up through.
- The front door seal - Ensure that the gasket did not flatten or wear out, causing a leakage of air to be pulled in from this loose seal.
2) Restrictions - this could occur when a buildup or clog starts to restrict airflow, and not as much volume of air is able to be drawn through the pellets, and thus slows the burn down.
We also made videos that may help illustrate the common areas that need to be cleaned that can lead to these sorts of restrictions.
Refer to the “Maintenance Videos” section at: https://comfortbilt.net/pages/our-videos for more information on proper cleaning for your stove model.
Or, you can check out the written guides here: https://cdn.shopify.com/s/files/1/0411/0670/2486/files/Guide-to-Stove-Cleaning.pdf?v=1597605162
Pellet quality will also play a huge role. If there is a lot of dirt or impurities in the pellets, there is a much higher chance for clinkers and blockages to occur in the pot.