What is the primary role of a high limit control?

The primary role of a high limit control is to shut off the burner to prevent overheating. This safety device is crucial in heating systems, as it monitors the temperature of the water or fluid within the system. If the temperature rises beyond a predetermined threshold, the high limit control will deactivate the burner to prevent damage to the system, potential leaks, or even fire hazards that could arise from excessive heat. This ensures safe operation and protects both the heating equipment and the home or facility it serves.

In various heating applications, maintaining safe operating temperatures is of utmost importance, and high limit controls serve as an essential safety measure to prevent situations that could lead to dangerous conditions.