{"product_id":"oem-lennox-burner-box-cover-lb-100684d-61m31","title":"OEM Lennox Burner Box Cover (LB-100684D) — 61M31","description":"\u003cp\u003eThe Lennox \u003cstrong\u003e61M31\u003c\/strong\u003e (factory number LB-100684D) is a genuine OEM burner box cover designed for compatible Lennox gas furnaces. This cover encloses the burner compartment, maintaining the sealed combustion environment, directing proper airflow to the burners, and containing the flame path for safe, efficient operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A warped, rusted, or missing burner box cover can allow air leakage that disrupts the burner air-fuel ratio, leading to flame rollout, sooting, uneven combustion, and nuisance safety lockouts. Gaps around a damaged cover may also let combustion products escape the enclosure or trip flame-sensing and rollout switches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The burner box cover is a safety-critical enclosure whose fit and gasketing directly affect combustion airflow and flame containment. The factory Lennox \u003cstrong\u003e61M31\u003c\/strong\u003e is manufactured to the exact dimensions, mounting pattern, and heat rating of your furnace's burner box, guaranteeing a proper seal and correct airflow balance. Generic or improvised covers can compromise combustion safety and efficiency — the OEM part restores the enclosure to factory specification.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081128395123,"sku":"LNX-61M31","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-61M31.jpg?v=1783759559","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-burner-box-cover-lb-100684d-61m31","provider":"National HVAC Parts","version":"1.0","type":"link"}