{"product_id":"oem-lennox-burner-assembly-602866-12-135-69w91","title":"OEM Lennox Burner Assembly (602866-12, 135) — 69W91","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e69W91\u003c\/strong\u003e burner assembly (factory reference 602866-12) delivers the fuel-air mixture to the flame and directs it into the heat exchanger on compatible Lennox gas furnaces. A correctly functioning burner is the foundation of clean, efficient combustion and reliable heat output throughout the season.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Aging or damaged burners often cause hard starts, delayed ignition with a small \"whoomp\" on light-off, uneven or lifting flames, yellow-tipped flames, rumbling noise, or rust and scale buildup on the burner ports. These conditions reduce efficiency and can trip the furnace on a safety limit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The \u003cstrong\u003e69W91\u003c\/strong\u003e is built to precise port sizing and orifice alignment so the flame profile matches what your Lennox furnace was engineered for. Generic burners can misalign with the ignitor and flame sensor, causing lockouts, sooting, and poor heat transfer. Choosing the factory Lennox part ensures proper flame geometry, safe operation, and full equipment compatibility.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081127706995,"sku":"LNX-69W91","price":49.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-burner-ribbon-LNX-69W91.jpg?v=1783759532","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-burner-assembly-602866-12-135-69w91","provider":"National HVAC Parts","version":"1.0","type":"link"}