{"product_id":"773-355","title":"773-355","description":"This premium air pressure switch is a critical safety component designed for high-efficiency HVAC systems and gas furnaces. Functioning as an air-proving sensor, it monitors the negative pressure generated by the draft inducer motor to ensure that the combustion process has proper ventilation. With a precise factory set point of -0.25\" WC (Water Column), this switch prevents the heating cycle from proceeding if it detects inadequate airflow or a blocked flue, protecting your equipment from potential damage and hazardous operating conditions. Ideal for restoring reliable ignition and performance, this durable switch is a necessary replacement for heating units experiencing pressure-related fault codes or intermittent startup failures.\u003cbr\u003e\nType: Air Pressure Switch\u003cbr\u003e\nSize: Small\u003cbr\u003e\nApplication: Commonly used in gas-fired furnaces, commercial rooftop units, and residential heating systems to verify proper venting and inducer motor operation.\u003cbr\u003e\nSpecifications: Set Point: -0.25\" WC; Function: Air Proving\/Safety Interlock; Sensing Type: Negative Pressure; Mounting: Standard HVAC bracket compatible.","brand":"BCFurnace","offers":[{"title":"LENNOX PRESSURE SWITCH -0.25\" WC \/ 773-355","offer_id":50568414724381,"sku":null,"price":86.8,"currency_code":"CAD","in_stock":true},{"title":"LENNOX PRESSURE SWITCH -0.25\" WC \/ 103827-01","offer_id":50568414789917,"sku":null,"price":86.8,"currency_code":"CAD","in_stock":true},{"title":"LENNOX PRESSURE SWITCH -0.25\" WC \/ 10J73","offer_id":50568414757149,"sku":null,"price":86.8,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/0a8a62174ea9460fad311357261109ab.webp?v=1773961486","url":"https:\/\/bcfurnace.myshopify.com\/products\/773-355","provider":"BCFurnace","version":"1.0","type":"link"}