What effect does dirt or lint build-up in the blades of the burner fan have?

Dirt or lint build-up in the blades of the burner fan reduces the efficiency of the fan by obstructing airflow. This obstruction hinders the amount of combustion air that can be drawn into the burner. Proper combustion requires a specific air-to-fuel ratio. When the airflow is restricted due to build-up, less air is available for combustion, resulting in an inadequate supply of oxygen. This can lead to incomplete combustion, producing higher levels of carbon monoxide and unburned fuel, and can negatively affect the overall performance and safety of the heating system.

Understanding this relationship highlights the importance of regular maintenance and cleaning of the burner and its components to ensure optimal operation and efficiency in heating systems.