{"product_id":"oem-lennox-heat-exchanger-assembly-10a57","title":"OEM Lennox Heat Exchanger Assembly — 10A57","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e10A57\u003c\/strong\u003e heat exchanger assembly is the heart of the heating process in compatible Lennox gas furnaces. It captures the heat produced by the burners and passes it to the circulating air, while its sealed walls keep combustion byproducts completely isolated from the air delivered to your living spaces. Built to Lennox factory specifications, it maintains the airflow path and heat-transfer efficiency your furnace was designed around.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Signs of a deteriorating heat exchanger include visible cracks, rust, or scaling, a yellow or wavering burner flame that should be crisp and blue, banging or rumbling noises during startup, weaker heat at the registers, and frequent short cycling. Because a cracked exchanger can release carbon monoxide into the home, treat any crack or CO alarm as an urgent safety matter and stop using the furnace until it is replaced.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters for Lennox:\u003c\/strong\u003e Heat exchangers are precisely formed for a specific burner layout and cabinet, so only the correct part delivers proper combustion and the safety barrier between flue gas and household air. The factory \u003cstrong\u003e10A57\u003c\/strong\u003e assembly guarantees exact fit, rated performance, and warranty and code compliance that off-brand parts cannot promise. Choose genuine OEM Lennox for safe, dependable, long-term heating.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081070821747,"sku":"LNX-10A57","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-10a57","provider":"National HVAC Parts","version":"1.0","type":"link"}