{"product_id":"543-039","title":"543-039","description":"The 3-inch Control Limit Switch L250-30F is a critical safety component designed for residential gas furnaces and HVAC heating systems. This high limit control switch acts as a thermal safeguard, monitoring the internal temperature of the heat exchanger to prevent overheating. When the air temperature reaches the fixed 250°F threshold, the switch automatically opens the electrical circuit to shut down the burner, protecting the appliance and your home from potential damage. Once the temperature drops by 30°F to a safe level (220°F), the switch resets, allowing for normal operation. If your furnace is short-cycling or failing to produce heat, a faulty high limit sensor may be the cause. This reliable replacement part features a 3-inch insertion probe, making it an essential component for maintaining safe and efficient furnace performance.\u003cbr\u003e\nType: High Limit Control Switch\u003cbr\u003e\nSize: 3-inch\u003cbr\u003e\nDimensions: 3 inches\u003cbr\u003e\nApplication: Gas furnaces, residential HVAC systems, and forced air heating equipment.\u003cbr\u003e\nSpecifications: Cut-out temperature: 250°F; Cut-in temperature: 220°F; 30°F differential; automatic reset; 3-inch insertion depth.","brand":"BCFurnace","offers":[{"title":"3\" CONTROL LIMIT L250-30F \/ 543-039","offer_id":47251315491101,"sku":null,"price":94.72,"currency_code":"CAD","in_stock":true},{"title":"3\" CONTROL LIMIT L250-30F \/ 83L86","offer_id":47251315523869,"sku":null,"price":94.72,"currency_code":"CAD","in_stock":true},{"title":"3\" CONTROL LIMIT L250-30F \/ 83L8601","offer_id":47251315556637,"sku":null,"price":94.72,"currency_code":"CAD","in_stock":true},{"title":"3\" CONTROL LIMIT L250-30F \/ L250-30F.","offer_id":47251315589405,"sku":null,"price":94.72,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/7ad98152b6ec466cab69b4d10a00758e.webp?v=1773958200","url":"https:\/\/bcfurnace.myshopify.com\/products\/543-039","provider":"BCFurnace","version":"1.0","type":"link"}