{"product_id":"oem-lennox-stainless-steel-heat-exchanger-assembly-53k71","title":"OEM Lennox Stainless Steel Heat Exchanger Assembly — 53K71","description":"\u003cp\u003eThe Lennox \u003cstrong\u003e53K71\u003c\/strong\u003e is a genuine OEM stainless steel heat exchanger assembly that transfers combustion heat to the air moving through your furnace while keeping flue gases safely separated from the airstream. Built from corrosion-resistant stainless steel, it is engineered to the exact tolerances of your Lennox furnace for proper airflow, burner alignment, and rated efficiency.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing heat exchanger often shows up as visible cracks or rust, a flickering or shifting burner flame, soot buildup, unusual odors, or a furnace that repeatedly trips on the limit switch and short-cycles. Because cracks can allow carbon monoxide to leak into the home's air, a compromised heat exchanger is a safety issue that should be replaced without delay.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The \u003cstrong\u003e53K71\u003c\/strong\u003e is manufactured to Lennox's original specifications, so it fits the burner box, gaskets, and mounting points precisely and preserves the combustion characteristics your furnace was certified for. Aftermarket substitutes can distort airflow, cause premature failure, and void warranty coverage. Choose the genuine OEM part for a safe, reliable, factory-correct repair.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081066987891,"sku":"LNX-53K71","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-stainless-steel-heat-exchanger-assembly-53k71","provider":"National HVAC Parts","version":"1.0","type":"link"}