{"product_id":"oem-lennox-furnace-pressure-switch-34m76","title":"OEM Lennox Furnace Pressure Switch — 34M76","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e34M76\u003c\/strong\u003e pressure switch safeguards your furnace by verifying that the inducer draft and combustion airflow are correct before ignition is allowed. It senses the pressure differential generated by the draft inducer and only permits the sequence to continue when venting is confirmed safe, preventing dangerous flue gas conditions inside your home.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e When the 34M76 fails, the furnace typically won't light, locks out on a pressure error, short-cycles, or repeatedly attempts ignition before shutting down. A diaphragm that sticks open, a switch that fails to close, or debris in the pressure tubing are frequent culprits.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Each Lennox pressure switch is factory-calibrated to a precise trip point matched to your furnace's inducer and vent design. A substitute switch with an incorrect set point can create nuisance faults or bypass an essential safety check. The 34M76 is the exact OEM component your Lennox system was engineered to use, delivering dependable operation and rated safety.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081108373875,"sku":"LNX-34M76","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-34M76.jpg?v=1783761165","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-furnace-pressure-switch-34m76","provider":"National HVAC Parts","version":"1.0","type":"link"}