What action is triggered by a plugged nozzle in a heating system?

In a heating system, a plugged nozzle primarily causes a flow interruption. When the nozzle becomes blocked due to fuel contaminants or degradation, it restricts or halts the flow of fuel necessary for proper combustion. This lack of fuel can lead to a number of operational issues, including incomplete combustion or a system shutdown, as the burner cannot receive the fuel needed to operate effectively.

While seal failures could occur in response to a variety of system stresses, they are not directly triggered by a plugged nozzle. The primary and immediate issue caused by a blockage in the fuel delivery system is indeed the interruption of flow, which prevents the burner from functioning as required. Understanding this relationship is crucial for troubleshooting heating system issues and emphasizes the importance of regular maintenance to prevent nozzle blockages.