{"product_id":"oem-lennox-2-stage-heat-exchanger-assembly-14d80","title":"OEM Lennox 2-Stage Heat Exchanger Assembly — 14D80","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e14D80\u003c\/strong\u003e heat exchanger assembly (superseding \u003cstrong\u003e614580-49\u003c\/strong\u003e, formerly 612224-41) is the primary combustion component in compatible two-stage Lennox gas furnaces. It transfers heat from the burner flame to the air moving across it while keeping combustion gases fully separated from your home's air supply. Its two-stage design supports the modulating firing rates that give these furnaces their quiet operation and improved seasonal efficiency.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing or cracked heat exchanger often shows up as a flickering or roll-out burner flame, a rumbling or clicking sound during heating cycles, visible rust, soot, or corrosion, and uneven heating. Because cracks can allow carbon monoxide to enter the airstream, a compromised heat exchanger is a safety concern that should be addressed immediately — a CO detector trip is a serious warning sign.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters for Lennox:\u003c\/strong\u003e Heat exchangers are precision-formed for the exact burner geometry, tubing pattern, and airflow of your specific Lennox furnace. The factory \u003cstrong\u003e14D80\u003c\/strong\u003e assembly guarantees correct fit, rated heat transfer, and the safety clearances Lennox engineered into the unit. Aftermarket or universal substitutes risk improper combustion, void warranties, and compromise the sealed barrier that protects your home. Choose OEM for safe, code-compliant, long-lasting performance.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081070756211,"sku":"LNX-14D80","price":39.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-2-stage-heat-exchanger-assembly-14d80","provider":"National HVAC Parts","version":"1.0","type":"link"}