{"product_id":"oem-lennox-heat-exchanger-assembly-47j43","title":"OEM Lennox Heat Exchanger Assembly — 47J43","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e47J43\u003c\/strong\u003e heat exchanger assembly is the primary component responsible for transferring combustion heat to your home's circulating air while keeping flue gases safely contained. Engineered to precise Lennox factory specifications, it delivers correct fit, proper burner alignment, and the rated efficiency your furnace was designed to achieve.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Warning signs of a failing heat exchanger include visible cracks or rust, a burner flame that flickers or changes shape when the blower runs, soot deposits, strange odors, and a furnace that keeps tripping on its high-limit switch. Since cracks can release carbon monoxide into the airstream, a suspected failure should be addressed immediately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Heat exchangers are safety-critical and manufactured to exacting metallurgical and dimensional standards. Choosing the OEM \u003cstrong\u003e47J43\u003c\/strong\u003e ensures an exact fit, preserves your furnace's safety listings, and protects any remaining manufacturer warranty — protections that aftermarket substitutes on a combustion component cannot guarantee.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081071837555,"sku":"LNX-47J43","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-47j43","provider":"National HVAC Parts","version":"1.0","type":"link"}