What should never be done to a limit control?

Bypassing a limit control permanently undermines its essential role in a heating system. Limit controls are safety devices designed to monitor and regulate temperature to prevent overheating, which can lead to catastrophic failures, fires, or equipment damage. When a limit control is bypassed, the system loses its fail-safe mechanism, allowing temperatures to rise unchecked. This can create hazardous conditions, not just for the equipment but also for the occupants of the building.

In contrast, limit controls must be properly installed and can indeed be set to accommodate specific system requirements within safe operating ranges. Regular inspection of limit controls is also critical to ensure that they function correctly, allowing for timely identification of any potential issues.