{"product_id":"000-317","title":"000-317","description":"This premium Lennox Limit Switch is an essential safety component designed for furnace and HVAC systems. As a high-limit control switch, it monitors the internal temperature of your heating equipment to prevent overheating. If the temperature reaches the 140°F threshold, the switch automatically interrupts the circuit to protect the heat exchanger and other internal components from thermal damage. Featuring a reliable auto-reset function, this fan disc switch restores the circuit once the system cools down by its 50°F differential (resetting at 90°F). It is a critical replacement part for maintaining the safe and efficient operation of residential or commercial forced-air heating systems, ensuring the blower fan and burner assembly function within safe thermal parameters.\u003cbr\u003e\nType: Fan Disc High Limit Control Switch\u003cbr\u003e\nSize: Standard 3\/4-inch or 1-inch mounting disc size\u003cbr\u003e\nApplication: Used in gas furnaces, electric heaters, and HVAC air handling units to provide high-temperature safety cut-out and automatic reset capabilities.\u003cbr\u003e\nSpecifications: Cut-out Temperature: 140°F; Differential: 50°F; Reset Temperature: 90°F; Reset Type: Automatic; Configuration: Normally Closed (NC) - Opens on temperature rise.","brand":"BCFurnace","offers":[{"title":"LENNOX LIMIT SWITCH, AUTO RESET, L140-50F \/ 000-317","offer_id":50215796965661,"sku":null,"price":67.99,"currency_code":"CAD","in_stock":true},{"title":"LENNOX LIMIT SWITCH, AUTO RESET, L140-50F \/ 28G45","offer_id":50215796998429,"sku":null,"price":67.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/250280490f6847e29ac8fc728a20b89b.webp?v=1773960752","url":"https:\/\/bcfurnace.myshopify.com\/products\/000-317","provider":"BCFurnace","version":"1.0","type":"link"}