{"product_id":"543-041","title":"543-041","description":"The 3\" High Limit Switch L170-20F is a vital safety component designed for residential gas furnaces and HVAC heating systems. This high-limit control switch acts as a thermal safeguard by monitoring the temperature within the heat exchanger. Specifically engineered to prevent overheating, the switch is set to automatically trip and break the electrical circuit if internal temperatures reach 170 degrees Fahrenheit. Once the unit cools down by 20 degrees, the switch resets, ensuring your heating equipment operates within safe thermal parameters. A malfunctioning limit switch can cause a furnace to cycle incorrectly or shut down entirely, making this replacement part essential for restoring reliable and safe heating performance.\u003cbr\u003e\nType: High Limit Control Switch\u003cbr\u003e\nSize: 3-inch probe length\u003cbr\u003e\nDimensions: 3 inches\u003cbr\u003e\nApplication: Used in forced-air gas furnaces and residential heating units to provide over-temperature protection and safety circuit management.\u003cbr\u003e\nSpecifications: Temperature Rating: Opens at 170°F (L170); Reset Differential: Closes at 150°F (20°F below opening point); Switch Type: Normally Closed, Opens on Temperature Rise.","brand":"BCFurnace","offers":[{"title":"3\" HIGH LIMIT SWITCH L170-20F \/ 543-041","offer_id":47251610403101,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L170-20F \/ 47-25350-06","offer_id":47251610468637,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L170-20F \/ 6618233","offer_id":47251610534173,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/192f09445f14410daa9f19356dac43cd.webp?v=1773959103","url":"https:\/\/bcfurnace.myshopify.com\/products\/543-041","provider":"BCFurnace","version":"1.0","type":"link"}