What components of the oil supply system need to be cleaned or replaced during the annual tune-up?

During an annual tune-up of an oil supply system, it's crucial to focus on components that directly affect the efficiency and safety of the oil burner operation. The correct choice highlights essential components that manage the flow and cleanliness of the oil being used.

The filter is vital for trapping contaminants such as dirt and debris that could obstruct flow or damage the burner. A clogged filter can lead to inadequate fuel supply, causing the burner to operate inefficiently or fail to ignite. Cleaning or replacing the filter ensures that the fuel delivered to the burner is free from impurities.

The pump screen plays a similar role, acting as a barrier to prevent larger particles from entering the fuel delivery system. Keeping the pump screen clean helps maintain optimal pump performance and reliability.

Lastly, the flush nozzle is responsible for properly atomizing the fuel for combustion. Over time, nozzles can become clogged or worn, affecting the spray pattern and efficiency of the burner. Replacing or cleaning the flush nozzle is crucial for ensuring complete combustion and minimizing emissions.

In contrast, while components such as the burner, flame sensor, and electrode (from another choice) are significant, they typically involve more direct aspects of the combustion process rather than the supply of oil itself. Similarly, options highlighting the oil tank and transfer