What maintenance step is critical for an oil furnace to operate efficiently?

Conducting combustion tests regularly is essential for ensuring that an oil furnace operates efficiently. These tests measure the efficiency of the combustion process, which directly impacts fuel consumption and emissions. By regularly monitoring the combustion efficiency, technicians can identify issues such as improper burner adjustment, which can lead to incomplete combustion. This not only wastes fuel but can also produce harmful pollutants.

Combo tests help in fine-tuning the burner to achieve the optimal air-to-fuel ratio, enhancing efficiency, and reducing carbon buildup that can cause operational problems or even safety hazards. Regular combustion testing, therefore, is a proactive maintenance measure that plays a crucial role in the long-term performance and safety of the oil furnace, making it an indispensable part of an effective maintenance routine.