{"product_id":"oem-lennox-burner-box-assembly-43w05","title":"OEM Lennox Burner Box Assembly — 43W05","description":"\u003cp\u003eThe Lennox \u003cstrong\u003e43W05\u003c\/strong\u003e burner box assembly (factory drawing LB-66958) houses and positions the furnace burners, delivering a stable, correctly aligned gas-air flame to the heat exchanger. Precise burner placement within the box is what ensures clean, safe combustion and even heat transfer throughout your Lennox furnace.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e delayed ignition or rollout, a yellow or lazy flame, sooting, rust and scale inside the box, warped or cracked housing, unusual combustion noise, and repeated flame-sensor or ignition lockouts. Years of heat cycling and corrosion can distort the assembly and misalign the burners.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e the genuine Lennox \u003cstrong\u003e43W05\u003c\/strong\u003e is engineered to hold the burners at the exact orifice spacing, orientation, and clearances your furnace was certified for, protecting flame quality and combustion safety. Aftermarket assemblies often misposition burners, disrupt the air-fuel mixture, and increase rollout risk. Installing the authentic OEM burner box restores factory-spec combustion, efficiency, and safety for your Lennox equipment.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081123742067,"sku":"LNX-43W05","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-43W05.jpg?v=1783759547","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-burner-box-assembly-43w05","provider":"National HVAC Parts","version":"1.0","type":"link"}