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

Dirt or lint build-up in the blades of the burner fan restricts the airflow necessary for proper combustion. An oil burner requires a precise mix of fuel and air to maintain efficient combustion. When dirt or lint accumulates, it impedes the fan's ability to move air effectively. This results in reduced combustion air reaching the burner.

When the amount of combustion air is diminished, it disrupts the fuel-to-air ratio. Inadequate air can lead to incomplete combustion, which may produce carbon monoxide and other harmful emissions, lowering the overall efficiency of the heating system. Therefore, reduced combustion air is a direct consequence of fan blade contamination, leading to operational challenges in the burner system.

Understanding this relationship is crucial for oil heat technicians, as maintaining fan cleanliness is essential for optimal burner performance and safety.