{"product_id":"oem-lennox-heat-exchanger-assembly-14k85","title":"OEM Lennox Heat Exchanger Assembly — 14K85","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e14K85\u003c\/strong\u003e heat exchanger assembly (also cross-referenced as 614580-60 and 612993-04) is the core heating component of your Lennox gas furnace. It transfers heat from the burner combustion gases to the air moving through your ductwork while keeping toxic flue gases safely separated from the air you breathe. Because it operates under constant heating and cooling cycles, the heat exchanger is one of the most critical safety and performance parts in the entire furnace.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms\u003c\/strong\u003e include visible cracks or rust on the exchanger walls, a flickering or rolling burner flame, soot buildup, unusual odors during operation, and elevated carbon monoxide readings. A cracked heat exchanger can allow combustion byproducts to mix with your indoor air, making prompt replacement essential for safe operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The Lennox \u003cstrong\u003e14K85\u003c\/strong\u003e is engineered to the exact tolerances, alloy specifications, and dimensions of your original assembly. Aftermarket substitutes can warp, fit poorly, or fail prematurely, voiding your warranty and compromising furnace safety. Installing the factory-correct OEM part ensures proper airflow, rated efficiency, and reliable heating season after season.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081075376499,"sku":"LNX-14K85","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-14k85","provider":"National HVAC Parts","version":"1.0","type":"link"}