{"product_id":"oem-lennox-stainless-steel-heat-exchanger-53k78","title":"OEM Lennox Stainless Steel Heat Exchanger — 53K78","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e53K78\u003c\/strong\u003e stainless steel heat exchanger assembly is the heart of your Lennox gas furnace's heating cycle, transferring combustion heat into the air circulated through your home while keeping flue gases isolated from your indoor air. Its stainless steel construction stands up to repeated heating and cooling cycles, resisting the cracking and corrosion that lead to premature failure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Telltale signs of a bad heat exchanger include visible cracks, rust, or soot, burner flames that flutter or roll out, a noticeable odor while the furnace runs, and carbon monoxide detector activation. Homeowners may also see declining heat output, repeated shutdowns on the high-limit switch, and popping or ticking noises at startup as the metal stresses.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The heat exchanger is a critical safety barrier, so an exact-fit, properly welded replacement is essential. The genuine Lennox \u003cstrong\u003e53K78\u003c\/strong\u003e is built to factory tolerances and stainless steel specifications, ensuring a sealed, correct fit that aftermarket alternatives can't guarantee. Installing the OEM part protects your family's air quality, restores rated efficiency, and helps maintain warranty coverage.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081076949363,"sku":"LNX-53K78","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-stainless-steel-heat-exchanger-53k78","provider":"National HVAC Parts","version":"1.0","type":"link"}