The Lennox 10M63 Auto Limit Switch is a safety control device designed to protect HVAC heating equipment from overheating. It monitors internal temperature and automatically opens the electrical circuit if unsafe heat levels are detected, then resets once normal conditions return. Commonly used in gas furnaces and air handlers, this limit switch helps prevent heat exchanger damage and... https://www.partshnc.com/120-160f-auto-limit-switch-6