{"product_id":"oem-lennox-heat-exchanger-assembly-57l30","title":"OEM Lennox Heat Exchanger Assembly — 57L30","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e57L30\u003c\/strong\u003e heat exchanger assembly is a critical combustion component engineered specifically for Lennox gas furnaces. It captures heat from the burner flames and transfers it to your home's air supply while keeping harmful flue gases isolated from the airflow. Built to original Lennox specifications, it restores full heating capacity and safe operation to your system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A compromised heat exchanger typically develops hairline cracks, rust, or scaling. You may see the burner flame flutter when the blower starts, experience frequent limit-switch trips and short-cycling, or detect a metallic or exhaust odor near the furnace. Any carbon monoxide alarm during operation signals an urgent need for replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Heat exchangers are safety-critical and must match Lennox's exact metal grade, weld quality, and dimensions. A generic substitute risks flue-gas leakage, premature failure, and voided warranty coverage. The factory-original \u003cstrong\u003e57L30\u003c\/strong\u003e delivers a precise, dependable, and safe repair. In stock and ready to ship same day before 3PM CST.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081067446643,"sku":"LNX-57L30","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-57l30","provider":"National HVAC Parts","version":"1.0","type":"link"}