{"product_id":"oem-lennox-pressure-switch-36k49","title":"OEM Lennox Pressure Switch — 36K49","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e36K49\u003c\/strong\u003e pressure switch is a critical safety component that confirms adequate venting airflow before your furnace's gas valve is allowed to open. It monitors the negative pressure created by the draft inducer and closes its contacts only when airflow is sufficient, protecting your home from unsafe combustion and flue gas backup. This switch is engineered to the exact pressure threshold specified for your Lennox equipment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e When the \u003cstrong\u003e36K49\u003c\/strong\u003e fails or drifts out of calibration, the furnace often locks out on ignition, short cycles, or displays a pressure switch fault code. You may hear the inducer motor start but the burners never light, or the unit may repeatedly attempt to fire and shut down.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Aftermarket switches frequently carry the wrong pressure rating, which can cause nuisance lockouts or, worse, allow the furnace to fire under unsafe venting conditions. The OEM Lennox \u003cstrong\u003e36K49\u003c\/strong\u003e is factory-matched to your system's specifications for reliable, safe operation and a proper fit every time.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081107947891,"sku":"LNX-36K49","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-36K49.jpg?v=1783763033","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-pressure-switch-36k49","provider":"National HVAC Parts","version":"1.0","type":"link"}