{"product_id":"oem-lennox-pressure-switch-80k52","title":"OEM Lennox Pressure Switch — 80K52","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e80K52\u003c\/strong\u003e pressure switch is a critical safety control that verifies proper venting and combustion airflow before your furnace ignites. It monitors the negative pressure created by the inducer motor and confirms the flue is clear, preventing the burners from firing under unsafe conditions. This switch is a factory-matched replacement engineered specifically for compatible Lennox furnace models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e When the \u003cstrong\u003e80K52\u003c\/strong\u003e fails or drifts out of calibration, you may notice the furnace short-cycling, locking out after a few seconds of ignition, displaying a pressure switch fault code, or refusing to start the heating sequence at all. A stuck-open or stuck-closed switch will halt operation as a safety measure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Pressure switches are calibrated to a precise trip point measured in inches of water column. Installing a genuine Lennox \u003cstrong\u003e80K52\u003c\/strong\u003e guarantees the correct pressure rating, port configuration, and electrical connections your system's control board expects — protecting both safe operation and your factory warranty. Aftermarket substitutes with incorrect setpoints can cause nuisance lockouts or, worse, allow unsafe firing.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081094611315,"sku":"LNX-80K52","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-single-LNX-80K52.jpg?v=1783763083","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-pressure-switch-80k52","provider":"National HVAC Parts","version":"1.0","type":"link"}