{"product_id":"543-005","title":"543-005","description":"Ensure the safety and efficiency of your heating system with this 3-inch furnace high limit switch. Designed as a critical thermal protection component for residential gas furnaces and HVAC units, this high limit control monitors the temperature of the heat exchanger. It acts as a safety cutout, automatically interrupting the heating cycle if the internal temperature reaches 220°F to prevent overheating and potential equipment damage. Once the temperature drops by 30°F, the switch resets to resume normal operation. This reliable replacement sensor is essential for troubleshooting furnace short-cycling or safety shutdown issues, providing peace of mind and maintaining optimal climate control performance in forced-air systems.\u003cbr\u003e\nType: HVAC High Limit Safety Switch\u003cbr\u003e\nSize: 3-inch insertion depth\u003cbr\u003e\nDimensions: 3 in\u003cbr\u003e\nApplication: Primarily used in residential gas furnaces and forced-air heating equipment to prevent heat exchanger overheating.\u003cbr\u003e\nSpecifications: Cut-out Temperature: 220°F; Differential (Cut-in): 30°F; Switch Type: Normally Closed (NC); Reset Type: Automatic","brand":"BCFurnace","offers":[{"title":"3\" HIGH LIMIT SWITCH L220-30F \/ 543-005","offer_id":47251216793885,"sku":null,"price":69.91,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L220-30F \/ 29M75","offer_id":47251216957725,"sku":null,"price":69.91,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L220-30F \/ 29M7501","offer_id":47251216924957,"sku":null,"price":69.91,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L220-30F \/ C340056P10","offer_id":47251216892189,"sku":null,"price":69.91,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L220-30F \/ SWT01273","offer_id":47251216826653,"sku":null,"price":69.91,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L220-30F \/ SWT1273","offer_id":47251216859421,"sku":null,"price":69.91,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/40153b901b74474dbefb08b62b814de1.webp?v=1773957838","url":"https:\/\/bcfurnace.myshopify.com\/products\/543-005","provider":"BCFurnace","version":"1.0","type":"link"}