000-317

Description

This premium Lennox Limit Switch is an essential safety component designed for furnace and HVAC systems. As a high-limit control switch, it monitors the internal temperature of your heating equipment to prevent overheating. If the temperature reaches the 140°F threshold, the switch automatically interrupts the circuit to protect the heat exchanger and other internal components from thermal damage. Featuring a reliable auto-reset function, this fan disc switch restores the circuit once the system cools down by its 50°F differential (resetting at 90°F). It is a critical replacement part for maintaining the safe and efficient operation of residential or commercial forced-air heating systems, ensuring the blower fan and burner assembly function within safe thermal parameters.

Specifications

Type

Fan Disc High Limit Control Switch

Size

Standard 3/4-inch or 1-inch mounting disc size

Application

Used in gas furnaces, electric heaters, and HVAC air handling units to provide high-temperature safety cut-out and automatic reset capabilities.

Specifications

Cut-out Temperature: 140°F; Differential: 50°F; Reset Temperature: 90°F; Reset Type: Automatic; Configuration: Normally Closed (NC) - Opens on temperature rise.