{"product_id":"773-419","title":"773-419","description":"This premium Lennox dual pressure switch is a critical safety and operational component designed for two-stage high-efficiency furnaces. As an air-proving switch, its primary function is to monitor the negative pressure generated by the inducer blower motor, ensuring that combustion gases are being safely and effectively vented out of the heat exchanger before ignition occurs. Engineered with dual SPST (Single Pole Single Throw) sensors, this switch is precision-calibrated to 0.90\" WC and 1.20\" WC to accommodate the specific draft requirements of both low-fire and high-fire heating stages. Replacing a failed or sticking pressure switch is essential for resolving furnace ignition failures and preventing system lockouts. This high-quality HVAC replacement part ensures your heating system operates at peak efficiency while maintaining rigorous safety standards.\u003cbr\u003e\nType: Air Pressure Switch\u003cbr\u003e\nSize: Small\u003cbr\u003e\nApplication: Used in two-stage gas furnaces and residential HVAC systems as a safety air-proving device for inducer motor operation.\u003cbr\u003e\nSpecifications: Dual pressure configuration, SPST (Single Pole Single Throw), Actuation setpoints: 0.90\" WC and 1.20\" WC, designed for 2-stage heating cycles.","brand":"BCFurnace","offers":[{"title":"LENNOX PRESSURE SWITCH, DUAL, SPST, 0.90\" WC \/ 1.20\" WC, 2 STAGE \/ 773-419","offer_id":50821597331741,"sku":null,"price":159.3,"currency_code":"CAD","in_stock":true},{"title":"LENNOX PRESSURE SWITCH, DUAL, SPST, 0.90\" WC \/ 1.20\" WC, 2 STAGE \/ 26W86","offer_id":50821597364509,"sku":null,"price":159.3,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/a166571557094275a95e7144590df9e3.webp?v=1773960722","url":"https:\/\/bcfurnace.myshopify.com\/products\/773-419","provider":"BCFurnace","version":"1.0","type":"link"}