The Marley Engineered Products 410143000 Auto Limit Switch 180°F–220°F is a temperature-sensitive safety device designed for Marley heaters and HVAC systems. It automatically interrupts electrical power when temperatures exceed safe operating limits, preventing overheating and equipment damage. Once the temperature returns to normal, the switch resets to restore operation. Built for r... https://www.partshnc.com/180-220f-auto-limit-switch-3