{"product_id":"543-040","title":"543-040","description":"This 3-inch High Limit Switch L230-30F is a vital safety component designed for residential and commercial heating systems. Functioning as a thermal cutout, this switch monitors the internal temperature of your furnace or air handler to prevent dangerous overheating. If the heat exchanger reaches the critical threshold of 230°F, the switch automatically opens to break the electrical circuit and shut down the burners, protecting your HVAC equipment from damage. Once the unit cools by 30°F, the switch resets to allow for normal operation. This replacement limit control is an essential part for maintaining the safety and performance of forced-air gas furnaces. If your heating system is short-cycling or failing to stay lit, a faulty safety sensor may be the cause, and this reliable L230-30F switch ensures your system stays within safe thermal parameters.\u003cbr\u003e\nType: Furnace High Limit Control Switch\u003cbr\u003e\nSize: 3-inch insertion depth\u003cbr\u003e\nDimensions: 3 in\u003cbr\u003e\nApplication: Used as a safety limit control in gas furnaces and forced-air heating systems to monitor heat exchanger temperatures.\u003cbr\u003e\nSpecifications: Temperature Limit: Opens at 230°F; Differential: 30°F (Closes at 200°F); Automatic reset; Single-pole, single-throw (SPST) configuration.","brand":"BCFurnace","offers":[{"title":"3\" HIGH LIMIT SWITCH L230-30F \/ 543-040","offer_id":47251333382429,"sku":null,"price":87.45,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L230-30F \/ 49L87","offer_id":47251333415197,"sku":null,"price":87.45,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L230-30F \/ 49L8701","offer_id":47251333447965,"sku":null,"price":87.45,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L230-30F \/ L230-30","offer_id":47251333480733,"sku":null,"price":87.45,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/3f8e649b01004b03bc62ebe90b1b625f.webp?v=1773958301","url":"https:\/\/bcfurnace.myshopify.com\/products\/543-040","provider":"BCFurnace","version":"1.0","type":"link"}