{"product_id":"oem-lennox-heat-exchanger-assembly-14d51","title":"OEM Lennox Heat Exchanger Assembly — 14D51","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e14D51\u003c\/strong\u003e heat exchanger assembly (factory reference 610280-04) is the core heating component of your Lennox gas furnace. It transfers heat generated by the burners into the circulating supply air while keeping combustion flue gases safely separated from the conditioned air in your home. Manufactured to original Lennox specifications, it delivers a precise fit, correct burner alignment, and full rated heating efficiency.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e look for a distorted, flickering, or discolored burner flame, visible cracks, rust, or soot on the exchanger, a burning or metallic smell during heating, and a furnace that short-cycles due to flame-sensor lockouts. A cracked heat exchanger can leak carbon monoxide into the airstream, so these warning signs call for immediate replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e the heat exchanger is a life-safety part where exact engineering is critical. The OEM \u003cstrong\u003e14D51\u003c\/strong\u003e matches Lennox steel gauge and burner geometry precisely, ensuring safe combustion, rated performance, and preserved warranty coverage that aftermarket substitutes cannot guarantee.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081066266995,"sku":"LNX-14D51","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-14d51","provider":"National HVAC Parts","version":"1.0","type":"link"}