Which component is typically responsible for detecting high temperatures in heating systems?

The temperature limit switch is responsible for detecting high temperatures in heating systems. This component is designed to monitor the temperature within the system and ensure it does not exceed a predetermined safe limit. If the temperature rises to a level that poses a risk of overheating or could potentially damage the system, the temperature limit switch will activate and shut down the heating process, thereby protecting both the equipment and its surrounding environment.

While each of the other components has its own specific functions in a heating system—such as the thermocouple which measures temperature, the air pressure switch that ensures proper airflow, and the water temperature gauge that merely indicates the temperature—the key role of the temperature limit switch is its proactive safety measure that prevents excessive heat from causing hazards. It acts autonomously to safeguard the system, making it a critical component for maintaining safe operational conditions.