What type of flame indicates a well-adjusted oil burner?

A well-adjusted oil burner will produce a flame that is blue and steady. This type of flame indicates complete combustion of the oil, which means that the burner is operating efficiently and safely. In combustion, a blue flame signifies that there is enough air mixed with the oil for complete combustion to occur, resulting in lower emissions of carbon monoxide and other harmful substances. Additionally, a steady flame suggests that the burner is maintaining a stable operation without fluctuations that could lead to incomplete burning or other operational issues.

On the other hand, an orange or red flame typically indicates incomplete combustion, which can be caused by an insufficient supply of air or improper burner adjustment. A white and flickering flame could demonstrate instability, often associated with a fluctuating oil supply or air flow issues. Lastly, a red and smoky flame is a clear indicator of inefficient combustion, leading to excessive soot build-up and increased emission of pollutants. These other flame colors and behaviors signal potential problems, making them less indicative of a properly adjusted oil burner.