{"product_id":"oem-lennox-heat-exchanger-assembly-19a63","title":"OEM Lennox Heat Exchanger Assembly — 19A63","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e19A63\u003c\/strong\u003e heat exchanger assembly is the heart of your Lennox furnace's heating system. As combustion gases pass through its tubes, the assembly transfers that heat to the air moving across it while sealing the exhaust byproducts away from your home's air supply. Built to Lennox factory specifications for tube layout, material, and mounting, it delivers reliable, safe, and efficient heat exchange.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Watch for cracks, corrosion, or rust on the exchanger surface, a distorted or flickering burner flame, soot deposits, strange odors during operation, or a tripped carbon monoxide detector. Reduced heating performance and frequent limit-switch shutdowns are also warning signs. A compromised heat exchanger is a safety hazard and warrants prompt replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Generic substitutes often deviate from Lennox's exact wall thickness and thermal-expansion tolerances, risking early failure or unsafe combustion. The OEM \u003cstrong\u003e19A63\u003c\/strong\u003e ensures a precise, factory-correct fit, keeps your Lennox warranty intact, and restores original rated efficiency and safety.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081068069235,"sku":"LNX-19A63","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-19a63","provider":"National HVAC Parts","version":"1.0","type":"link"}