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

Dirt or lint buildup in the bevel of the burner fan blades primarily reduces air delivery to the burner. When debris accumulates, it creates additional resistance against the airflow. This obstruction means the fan has to work harder to push air through, and often it cannot maintain the required airflow to achieve optimal combustion. Reduced air delivery can lead to issues such as incomplete combustion, which can result in wasted fuel, increased emissions, and potential safety hazards due to improper burning conditions. Maintaining clean and unobstructed burner fan blades is crucial for ensuring that the system operates effectively and efficiently.