{"product_id":"oem-lennox-heat-exchanger-assembly-53k72","title":"OEM Lennox Heat Exchanger Assembly — 53K72","description":"\u003cp\u003eThe OEM Lennox \u003cstrong\u003e53K72\u003c\/strong\u003e heat exchanger assembly is the primary heat-transfer component in your Lennox gas furnace. As combustion gases pass through its tubes, heat radiates into the circulating air stream while the sealed passages keep flue byproducts isolated from the air you breathe. Every dimension, tube contour, and weld is built to Lennox factory specification for a precise, safe fit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Watch for visible rust or cracking, soot buildup, a burner flame that flickers or changes shape when the blower starts, strange odors during heating cycles, or a furnace that repeatedly trips its limit or rollout switch. Because a cracked heat exchanger can leak carbon monoxide into the home, replacement is a safety priority.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Generic heat exchangers can differ in steel alloy, thickness, and fit, risking early failure, reduced efficiency, and voided warranties. The OEM Lennox \u003cstrong\u003e53K72\u003c\/strong\u003e restores your furnace's rated output and AFUE efficiency while maintaining its original safety listing. Factory-correct fit means a cleaner installation and dependable, long-term performance for your Lennox equipment.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081068757363,"sku":"LNX-53K72","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-53k72","provider":"National HVAC Parts","version":"1.0","type":"link"}