{"product_id":"773-138","title":"773-138","description":"Ensure the safe and efficient operation of your heating system with this premium air pressure switch. Designed as a critical safety component for forced-air furnaces, this air proving switch monitors the negative pressure created by the inducer motor to verify proper airflow before allowing the ignition cycle to begin. Calibrated to a precise 0.51\" WC (water column) set point, it acts as a safeguard against dangerous conditions such as blocked vents, flue obstructions, or inducer motor failure. This high-reliability sensor is an essential replacement part for resolving furnace startup issues and ensuring your HVAC equipment meets original performance standards for combustion safety.\u003cbr\u003e\nType: Air Pressure Switch\u003cbr\u003e\nSize: Compact\u003cbr\u003e\nApplication: Residential gas furnaces and HVAC heating units requiring combustion air proving and draft pressure monitoring.\u003cbr\u003e\nSpecifications: Pressure Set Point: 0.51\" WC; Application: Air Proving; Media: Air","brand":"BCFurnace","offers":[{"title":"LENNOX PRESSURE SWITCH 0.51\" WC \/ 773-138","offer_id":47251298320669,"sku":null,"price":232.51,"currency_code":"CAD","in_stock":true},{"title":"LENNOX PRESSURE SWITCH 0.51\" WC \/ 49L91","offer_id":47251298353437,"sku":null,"price":232.51,"currency_code":"CAD","in_stock":true},{"title":"LENNOX PRESSURE SWITCH 0.51\" WC \/ 49L9101","offer_id":47251298386205,"sku":null,"price":232.51,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/0547900a4c884550bb2a71d1713b5f9c.webp?v=1773958046","url":"https:\/\/bcfurnace.myshopify.com\/products\/773-138","provider":"BCFurnace","version":"1.0","type":"link"}