{"product_id":"oem-lennox-heat-exchanger-assembly-73m14","title":"OEM Lennox Heat Exchanger Assembly — 73M14","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e73M14\u003c\/strong\u003e heat exchanger assembly transfers heat from the burner flame into your home's air supply while keeping combustion gases isolated within a sealed passage. Built to precise Lennox factory tolerances, it restores your furnace's original heating output, airflow balance, and critical safety separation between flue gases and conditioned air.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Typical warning signs include visible cracking or corrosion on the exchanger, a distorted or flickering burner flame, soot accumulation, strange odors when the furnace runs, and repeated tripping of the high-limit safety switch. A compromised exchanger can allow carbon monoxide into the airstream, so these symptoms should never be ignored.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Because it handles combustion heat and gas containment, the heat exchanger is a life-safety part where exact fit and materials are essential. This authentic Lennox \u003cstrong\u003e73M14\u003c\/strong\u003e assembly matches the original alloy, gauge, and geometry to seal correctly, distribute heat evenly, and keep your warranty intact. Aftermarket versions can misalign and undermine both efficiency and safety. Choose OEM Lennox for dependable, worry-free performance.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081073967475,"sku":"LNX-73M14","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-73m14","provider":"National HVAC Parts","version":"1.0","type":"link"}