State of Maine fuel Board rules require what switch mounted above the Central Heating Appliances

• A. Thermal cut off switch
• B. Pressure switch
• C. Reset switch
• D. Carbon monoxide detector

Answer: (A)

A thermal cut-off switch is used as a safety device that automatically opens the electrical circuit when the appliance temperature reaches a preset limit. Placing it above the central heating appliance lets it sense heat from the unit quickly and shut off power before overheating can cause damage or a fire. This direct temperature-based shutoff is the specific protection required by Maine fuel board rules for that location. Other devices serve different purposes—a pressure switch monitors gas or system pressure, a reset switch is not an automatic shutoff, and a carbon monoxide detector alerts to CO presence rather than interrupting power. So the mandatory choice is the thermal cut-off switch.