{"product_id":"oem-lennox-pressure-switch-80w52","title":"OEM Lennox Pressure Switch — 80W52","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e80W52\u003c\/strong\u003e pressure switch monitors draft in your Lennox gas furnace, confirming that the inducer is producing adequate negative pressure to safely vent combustion byproducts. The furnace control board relies on the \u003cstrong\u003e80W52\u003c\/strong\u003e to close before it will energize the igniter, making this a key link in the ignition safety chain.\u003c\/p\u003e\u003cp\u003eWhen the \u003cstrong\u003e80W52\u003c\/strong\u003e goes bad, you may see the furnace attempt to start and then lock out, a flashing pressure switch fault code, or repeated short cycling. Common causes include a ruptured or clogged sensing hose, a diaphragm that no longer seals, or a switch that has drifted out of its calibrated range.\u003c\/p\u003e\u003cp\u003eSince each pressure switch is factory-set to a precise water-column value, only the OEM Lennox \u003cstrong\u003e80W52\u003c\/strong\u003e guarantees the correct trip point and hose fittings for your model. A mismatched aftermarket switch risks nuisance lockouts or unsafe firing. Genuine Lennox parts restore proper draft proving and keep your furnace running safely.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081094349171,"sku":"LNX-80W52","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-80W52.jpg?v=1783763086","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-pressure-switch-80w52","provider":"National HVAC Parts","version":"1.0","type":"link"}