What is a common indicator of improper combustion in an oil burner?

A common indicator of improper combustion in an oil burner is the excess smoke and soot formation. When combustion is functioning correctly, the oil should burn cleanly and efficiently, producing a clear flame with minimal emissions. However, if the combustion process is inefficient or incomplete, it can lead to the production of particulate matter such as soot, which results from unburned fuel. This soot can accumulate in the combustion chamber and on heating surfaces, reducing efficiency and potentially leading to serious maintenance issues.

In addition, excess smoke may indicate that the burner is not atomizing the oil properly, which is crucial for mixing fuel with air and achieving an efficient burn. Monitoring and addressing these signs is important for maintaining optimal operation, safety, and environmental compliance of the heating system.