{"product_id":"543-017","title":"543-017","description":"This premium 3-inch high limit switch is an essential safety component for residential and commercial forced-air heating systems. Designed to monitor internal temperatures within the furnace heat exchanger, this L180-30F control switch acts as a critical fail-safe by automatically interrupting the heating cycle if the unit exceeds safe operating temperatures. Engineered for reliability, the switch features a normally closed circuit that opens at 180 degrees Fahrenheit and resets once the temperature drops by 30 degrees. Replacing a faulty limit sensor is vital for preventing equipment damage and ensuring the safe, efficient operation of your HVAC system. This durable temperature-sensing probe is a standard requirement for maintaining optimal airflow safety and protecting against overheating in modern gas and electric furnaces.\u003cbr\u003e\nType: High Limit Control Switch\u003cbr\u003e\nSize: 3-inch insertion depth\u003cbr\u003e\nDimensions: 3 inches\u003cbr\u003e\nApplication: Used as a primary safety thermal cutout in gas furnaces, electric furnaces, and HVAC air handlers to prevent heat exchanger overheating.\u003cbr\u003e\nSpecifications: Temperature Rating: Opens at 180°F, Closes at 150°F (30°F Differential); Circuitry: Normally Closed (NC); Mounting: Flange mount with 3-inch probe insertion.","brand":"BCFurnace","offers":[{"title":"3\" HIGH LIMIT SWITCH L180-30F \/ 543-017","offer_id":47251275710749,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L180-30F \/ C340366P06","offer_id":47251275776285,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L180-30F \/ L180-30F.","offer_id":47251275809053,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L180-30F \/ SWT01365","offer_id":47251275874589,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L180-30F \/ SWT01635","offer_id":47251275743517,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L180-30F \/ SWT1365","offer_id":47251275907357,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L180-30F \/ SWT1635","offer_id":47251275841821,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/0d27d11325fc4fbf8112e3518b304c27.webp?v=1773958049","url":"https:\/\/bcfurnace.myshopify.com\/products\/543-017","provider":"BCFurnace","version":"1.0","type":"link"}