{"product_id":"oem-lennox-heat-exchanger-assembly-53l58","title":"OEM Lennox Heat Exchanger Assembly — 53L58","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e53L58\u003c\/strong\u003e heat exchanger assembly is the core combustion component of your gas furnace, transferring heat from burning fuel to the air circulating through your home while keeping combustion gases safely separated from the airstream. This factory part is engineered to the exact tolerances of your Lennox unit, ensuring proper airflow, rated efficiency, and reliable ignition cycles.\u003c\/p\u003e\u003cp\u003eHeat exchangers fail over years of thermal expansion and contraction. Common symptoms include visible cracks or rust, a flickering or rolling burner flame, soot buildup, unusual odors, and — most seriously — the potential for carbon monoxide to enter your living space. A cracked heat exchanger should be replaced immediately for safety.\u003c\/p\u003e\u003cp\u003eChoosing an OEM Lennox \u003cstrong\u003e53L58\u003c\/strong\u003e matters because heat exchangers are safety-critical and dimensionally precise. Aftermarket substitutes may not seal correctly against the burner box or combustion blower, risking flame disruption, condensation damage, and dangerous flue-gas leakage. The genuine assembly guarantees a proper fit and preserves your furnace's original safety certification and warranty coverage.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081073049971,"sku":"LNX-53L58","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-53l58","provider":"National HVAC Parts","version":"1.0","type":"link"}