{"product_id":"oem-lennox-heat-exchanger-assembly-16j36","title":"OEM Lennox Heat Exchanger Assembly — 16J36","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e16J36\u003c\/strong\u003e heat exchanger assembly is the core component that transfers heat from your furnace's combustion process to the air circulating through your home, all while keeping combustion byproducts safely separated from your breathing air. Engineered to exact Lennox specifications, it restores the rated heating capacity and safety margins of your original equipment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing heat exchanger often shows up as visible cracks or corrosion, a flickering or wavering burner flame, soot buildup, unusual odors during operation, or a furnace that repeatedly trips on the high-limit switch. Cracks are especially serious because they can allow carbon monoxide to enter the airstream, making prompt replacement critical for safety.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The heat exchanger is a life-safety component, so fit and metallurgy are not areas to compromise. This authentic Lennox \u003cstrong\u003e16J36\u003c\/strong\u003e part is built to the same tolerances, alloy, and pressure ratings as the assembly that shipped with your furnace, ensuring a proper seal, correct airflow, and full compatibility with your Lennox system. Aftermarket substitutes can shift heat distribution and void your warranty. Choose OEM to protect both performance and safety.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081073901939,"sku":"LNX-16J36","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-16j36","provider":"National HVAC Parts","version":"1.0","type":"link"}