{"product_id":"oem-lennox-pressure-switch-80w51","title":"OEM Lennox Pressure Switch — 80W51","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e80W51\u003c\/strong\u003e pressure switch is a furnace safety device that verifies proper venting before ignition. It reads the negative pressure generated by the draft inducer and, once the correct draft is proven, signals the control board that it is safe to light the burners. The \u003cstrong\u003e80W51\u003c\/strong\u003e protects your home from the hazards of a blocked flue or failed inducer.\u003c\/p\u003e\u003cp\u003eA worn or failed \u003cstrong\u003e80W51\u003c\/strong\u003e typically results in a furnace that ignites the inducer but never fires the burners, a pressure switch lockout code, or intermittent short cycling. Cracked tubing, a leaking diaphragm, or a switch that has fallen out of calibration are the usual reasons this part needs replacement.\u003c\/p\u003e\u003cp\u003ePressure switches are calibrated to a specific water-column setting, so installing the OEM Lennox \u003cstrong\u003e80W51\u003c\/strong\u003e ensures the exact trip point and fittings your furnace requires. Substituting a generic switch can cause persistent no-heat lockouts or unsafe operation. Choose genuine Lennox for a factory-correct fit and dependable safety performance.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081094414707,"sku":"LNX-80W51","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-80W51.jpg?v=1783763085","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-pressure-switch-80w51","provider":"National HVAC Parts","version":"1.0","type":"link"}