{"product_id":"oem-lennox-heat-exchanger-assembly-84k48","title":"OEM Lennox Heat Exchanger Assembly — 84K48","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e84K48\u003c\/strong\u003e heat exchanger assembly is the core combustion component in your Lennox gas furnace, transferring heat from the burning fuel to the air circulated through your home while keeping combustion gases safely separated from your breathing air. Engineered to exact factory specifications, this assembly restores rated heating capacity and maintains the safe operation your Lennox system was designed to deliver.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing or cracked heat exchanger often shows up as visible rust, soot or scale, flickering or roll-out burner flames, a strong odor when the furnace runs, or a carbon monoxide detector alarm. You may also notice reduced heat output, unusual popping or rattling on startup, or a furnace that repeatedly shuts down on the limit switch. A compromised heat exchanger is a safety concern and should be replaced promptly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e A heat exchanger is a life-safety part — the barrier between combustion byproducts and your indoor air. Genuine Lennox \u003cstrong\u003e84K48\u003c\/strong\u003e assemblies are built and tested to the original tolerances, alloy specifications, and welds required for a proper, leak-free fit in your furnace. Aftermarket substitutes can compromise fit, efficiency, and warranty coverage, so installing the OEM part protects both performance and safety.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081076883827,"sku":"LNX-84K48","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-84k48","provider":"National HVAC Parts","version":"1.0","type":"link"}