{"product_id":"oem-lennox-pressure-switch-80w57","title":"OEM Lennox Pressure Switch — 80W57","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e80W57\u003c\/strong\u003e pressure switch is a safety control that confirms proper airflow and draft conditions before your Lennox furnace or HVAC system is allowed to operate. By sensing the pressure differential created by the inducer motor, it verifies that the venting path is clear and the combustion process can proceed safely, acting as a key interlock in the ignition sequence.\u003c\/p\u003e\u003cp\u003eSymptoms of a failing \u003cstrong\u003e80W57\u003c\/strong\u003e include the furnace not igniting, short cycling, the inducer running while the burners stay off, or control-board error codes pointing to an open or stuck pressure switch. Blocked vent piping, a disconnected or plugged pressure hose, and internal contact wear all produce these same faults and lead to frustrating intermittent no-heat conditions.\u003c\/p\u003e\u003cp\u003eOEM matters because the \u003cstrong\u003e80W57\u003c\/strong\u003e is calibrated to the exact trip point Lennox specifies for your equipment. A generic switch with the wrong threshold can cause nuisance lockouts or defeat the safety function altogether. This direct factory replacement guarantees correct calibration, proper fit, and dependable safety operation for your Lennox system.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081140748659,"sku":"LNX-80W57","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-80W57.jpg?v=1783763090","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-pressure-switch-80w57","provider":"National HVAC Parts","version":"1.0","type":"link"}