Lennox 20W33 Manual Reset SPST Rollout Switch 340°F

The Lennox 20W33 SPST Manual Reset Rollout Switch is an electrical element used to cut off electrical power when temperatures rise to 340°F in places where flame rollout, or excessive heat can take place such as HVAC systems. It is a single-pole single-throw, temperature-operated switch that opens its contact at the preset value and stays open until it is manually cleared. This rollout switch is installed in the vicinity of heat exchangers or combustion areas of gas-fired plants and is connected to control circuits that protect the overheating of components and the attention of furnaces and other heating elements.