{"product_id":"oem-lennox-heat-exchanger-assembly-19a61","title":"OEM Lennox Heat Exchanger Assembly — 19A61","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e19A61\u003c\/strong\u003e heat exchanger assembly is the core combustion component of your Lennox gas furnace. It transfers heat from the burning fuel to the circulating air stream while keeping toxic combustion byproducts safely separated from the air your family breathes. Built to exact Lennox specifications, this assembly restores rated heating output and efficiency to your system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing heat exchanger often shows visible cracks or rust, produces a flickering or roll-out burner flame, triggers repeated flame-sensor or limit-switch shutdowns, and can allow carbon monoxide to enter the home. You may also notice a strong odor near the furnace, soot buildup, or unexplained CO detector alarms — all reasons to replace the assembly immediately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The heat exchanger is a safety-critical part. Aftermarket or misfit units can warp, leak flue gas, or void your Lennox warranty. This factory-original \u003cstrong\u003e19A61\u003c\/strong\u003e guarantees correct metallurgy, weld integrity, and dimensional fit for a lasting, safe repair. In stock and ready to ship same day before 3PM CST.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081067381107,"sku":"LNX-19A61","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-19a61","provider":"National HVAC Parts","version":"1.0","type":"link"}