{"product_id":"oem-lennox-heat-exchanger-assembly-612983-05-14k73","title":"OEM Lennox Heat Exchanger Assembly 612983-05 — 14K73","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e14K73\u003c\/strong\u003e heat exchanger assembly (factory reference 612983-05) is the heart of your Lennox gas furnace's heating cycle. It captures heat produced by the burners and transfers it into the blower airflow, all while containing and venting combustion byproducts safely away from your home. Precision-formed sections maximize heat transfer surface area for efficient, even heating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms\u003c\/strong\u003e include cracked or corroded metal, a burner flame that flutters when the blower engages, rust or soot buildup, strange smells during operation, condensation around the furnace, or a triggered carbon monoxide alarm. Because a compromised heat exchanger can leak flue gases into conditioned air, replacement is a safety priority.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The \u003cstrong\u003e14K73\u003c\/strong\u003e is built to Lennox's exact metallurgical and dimensional specifications, ensuring an airtight seal, proper gas containment, and full rated efficiency. Generic replacements can warp, seal poorly, or fail early. Installing the authentic OEM assembly restores your furnace to factory performance and preserves its safety certification. Professional installation by a licensed HVAC technician is strongly recommended.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081076228467,"sku":"LNX-14K73","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-612983-05-14k73","provider":"National HVAC Parts","version":"1.0","type":"link"}