{"product_id":"543-052","title":"543-052","description":"This 3-inch High Limit Switch (L190-220F) is a vital safety component designed for residential furnaces and HVAC heating systems. Functioning as a thermal protection device, this limit control monitors the heat exchanger or plenum temperature to prevent the appliance from overheating. If internal temperatures reach the designated safety threshold—specifically the 220°F limit—the switch automatically interrupts the circuit to the burner or heating element. Once the system cools to the 190°F reset point, it allows the unit to resume operation. This high-quality replacement part features a 3-inch insertion probe for precise temperature sensing, ensuring your heating system operates safely and efficiently. It is a common fix for furnaces that are short-cycling or shutting down prematurely due to airflow or temperature issues.\u003cbr\u003e\nType: High Limit Control Switch\u003cbr\u003e\nSize: 3-inch insertion depth\u003cbr\u003e\nDimensions: 3 in\u003cbr\u003e\nApplication: Used in gas furnaces, electric heaters, and central HVAC units as a primary thermal safety cutoff.\u003cbr\u003e\nSpecifications: Temperature Range: L190-220F (Opens at 220°F, Resets at 190°F); Circuit: Normally Closed (NC); Probe Length: 3 inches.","brand":"BCFurnace","offers":[{"title":"3\" HIGH LIMIT SWITCH L190-220F \/ 543-052","offer_id":47251377783069,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true},{"title":"3\" HIGH LIMIT SWITCH L190-220F \/ 1370911S","offer_id":47251377815837,"sku":null,"price":68.83,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/1a5a32c304724c3aa4fa4a9187c9c1ec.webp?v=1773958407","url":"https:\/\/bcfurnace.myshopify.com\/products\/543-052","provider":"BCFurnace","version":"1.0","type":"link"}