{"product_id":"oem-lennox-heat-exchanger-assembly-14d63","title":"OEM Lennox Heat Exchanger Assembly — 14D63","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e14D63\u003c\/strong\u003e heat exchanger assembly (factory references 612998-14 and 610280-21) is the core combustion component in your Lennox gas furnace. It transfers heat from the burner flames to the air moving across it while safely containing and venting combustion byproducts. Because it separates the flue gases from your conditioned airflow, a sound heat exchanger is essential to both furnace performance and household safety.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e visible cracks or corrosion, a flickering or rolling burner flame, soot buildup, rumbling or booming on ignition, unusual odors, or a carbon monoxide detector alarm. A cracked heat exchanger can allow flue gases to mix with your home's air and should be replaced without delay.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e the \u003cstrong\u003e14D63\u003c\/strong\u003e is engineered to the exact metallurgy, dimensions, and pressure tolerances of your specific Lennox furnace model. Aftermarket substitutes can compromise the seal, airflow pattern, and heat rating, risking premature failure and voided warranties. Installing the correct OEM assembly restores rated efficiency, proper fit, and safe operation.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081065349491,"sku":"LNX-14D63","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-14d63","provider":"National HVAC Parts","version":"1.0","type":"link"}