What can result from improper air-to-fuel ratio adjustment?

An improper air-to-fuel ratio adjustment can lead to soot buildup and incomplete combustion. This occurs when the mixture of air and fuel is not optimized for efficient burning. If there is not enough air (a rich mixture), the fuel will not combust completely, resulting in soot as a byproduct. Soot can accumulate in the combustion chamber and flue passages, leading to clogged components and reduced efficiency of the heating system. It can also pose safety and maintenance issues, such as an increased risk for chimney fires and the necessity for more frequent cleaning. Properly balancing the air-to-fuel ratio ensures efficient combustion, minimizes pollutants, and maintains the reliability of the burner system.