The Nordyne 626343R Manual Reset SPST Rollout Switch is a safety device designed for use in Nordyne furnaces and HVAC systems. Rated at 300°F, it detects abnormal heat levels near the burner area and shuts down the system to prevent overheating or potential damage. This manual reset switch ensures safe operation by requiring a reset after activation, preventing automatic restarts in u... https://www.partshnc.com/626343r-nordyne-300f-mr-spst-rollout-switch