{"product_id":"543-033","title":"543-033","description":"Ensure the safe and efficient operation of your heating system with this premium 3-inch High Limit Switch. As a critical safety component in HVAC and forced-air furnaces, this high limit control switch is designed to monitor internal temperatures and prevent overheating. When the system reaches the preset thermal threshold of 150°F, the switch automatically interrupts the electrical circuit to shut down the heating element or burner, protecting your heat exchanger from damage. This L150-40F model features a 40-degree differential, meaning it will automatically reset and restore power once the temperature cools to 110°F. If your furnace is short-cycling or failing to maintain a consistent flame, replacing a worn or faulty thermal limit sensor is essential for maintaining home safety and appliance longevity.\u003cbr\u003e\nType: HVAC High Limit Control Switch\u003cbr\u003e\nSize: 3-inch insertion depth\u003cbr\u003e\nDimensions: 3 in\u003cbr\u003e\nApplication: Commonly used in residential forced-air furnaces, HVAC units, and heating systems as a primary safety cutout to prevent overheating.\u003cbr\u003e\nSpecifications: Temperature Trip Point: 150°F (Open); Temperature Reset Point: 110°F (Close); Differential: 40°F; Circuit Configuration: Normally Closed (NC); Mounting: 3-inch flange\/probe insertion.","brand":"BCFurnace","offers":[{"title":"3\" HIGH LIMIT SWITCH L150-40F \/ 543-033","offer_id":47251351863581,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L150-40F \/ 1NT23L-3641","offer_id":47251351961885,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L150-40F \/ 36M62","offer_id":51059002900765,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L150-40F \/ 36M6201","offer_id":51059002638621,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L150-40F \/ HH12ZB150","offer_id":47251351896349,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L150-40F \/ L150-40F.","offer_id":47251351929117,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L150-40F \/ R20001108","offer_id":51059002212637,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/14913382f8f349d3aedf8d6c5d8e2048.webp?v=1773958326","url":"https:\/\/bcfurnace.myshopify.com\/products\/543-033","provider":"BCFurnace","version":"1.0","type":"link"}