{"product_id":"773-345","title":"773-345","description":"Ensure your heating system operates safely and efficiently with this premium Lennox Pressure Switch. As a critical air proving safety component, this Single Pole Single Throw (SPST) switch is designed to monitor the negative pressure generated by the inducer draft motor. With a precise factory setpoint of -0.36\" WC, it verifies that the combustion blower is moving sufficient air through the heat exchanger before allowing the furnace ignition sequence to proceed. This pressure sensor acts as a vital fail-safe, preventing the burner from firing if it detects a blocked vent, a failing blower motor, or restricted airflow. Built for durability and high-performance reliability, it is an essential replacement part for maintaining the safety standards of residential gas furnaces and HVAC units.\u003cbr\u003e\nType: Air Pressure Switch\u003cbr\u003e\nSize: Compact\u003cbr\u003e\nApplication: Residential gas furnaces, forced-air heating systems, and HVAC induced draft assemblies for air proving and combustion safety monitoring.\u003cbr\u003e\nSpecifications: Pressure Setting: -0.36\" WC; Contact Configuration: SPST (Single Pole Single Throw); Function: Normally Open, closes on pressure rise; Application: Air Proving.","brand":"BCFurnace","offers":[{"title":"LENNOX PRESSURE SWITCH -0.36\" WC, SPST \/ 773-345","offer_id":50568393097501,"sku":null,"price":158.39,"currency_code":"CAD","in_stock":true},{"title":"LENNOX PRESSURE SWITCH -0.36\" WC, SPST \/ 56L32","offer_id":50568393130269,"sku":null,"price":158.39,"currency_code":"CAD","in_stock":true},{"title":"LENNOX PRESSURE SWITCH -0.36\" WC, SPST \/ 56L3201","offer_id":50568393163037,"sku":null,"price":158.39,"currency_code":"CAD","in_stock":true},{"title":"LENNOX PRESSURE SWITCH -0.36\" WC, SPST \/ MP2168","offer_id":50568393195805,"sku":null,"price":158.39,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/a5229ed365344515a26e5b3449ea883e.webp?v=1773965893","url":"https:\/\/bcfurnace.myshopify.com\/products\/773-345","provider":"BCFurnace","version":"1.0","type":"link"}