543-031

Ensure your heating system operates safely and efficiently with this high-quality 2-inch high limit switch. Designed as a critical safety component for residential furnaces and HVAC units, this thermal limit control prevents the heat exchanger from overheating by automatically interrupting the electrical circuit when internal temperatures exceed safe limits. It also plays a vital role in regulating blower motor operation, ensuring the fan continues to run until the unit has cooled sufficiently. This L170-40F switch is a common replacement part for heating systems experiencing short-cycling or continuous fan operation. By maintaining precise thermal thresholds, it helps extend the lifespan of your heating equipment and protects your home from potential hazards. Perfect for HVAC maintenance, repairs, and ensuring reliable performance during cold weather months.
Type: High Limit Control Switch
Size: 2-inch probe depth
Dimensions: 2 in
Application: Used in forced-air furnaces, HVAC systems, and heating units to monitor heat exchanger temperatures and control blower fan cycling.
Specifications: Temperature Rating: L170-40F (Opens at 170°F, 40°F differential/resets at 130°F); Sensor Type: Bi-metal disc; Mounting Style: Flange-mount.