White-Rodgers 3L01-140 HVAC Disc Thermostat Limit Control, Opens at 140°F, Closes at 100°F

3L01-140 White-Rodgers 3L01-140 Disc Thermostat Limit Control, Opens at 140°F, Closes at 100°F
This is an automatic reset snap disc limit control that functions as a safety device in heating systems; it is designed to open its electrical circuit and shut off the heating element when the temperature reaches 140°F, and automatically closes again when the temperature falls to 100°F.