{"product_id":"oem-lennox-heat-exchanger-assembly-70w07","title":"OEM Lennox Heat Exchanger Assembly — 70W07","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e70W07\u003c\/strong\u003e heat exchanger assembly — also cross-referenced as Lennox 605731-02 and 604904-04 — transfers combustion heat into the air that circulates through your home while keeping flue gases sealed and separated from your indoor environment. It is essential to the safe, efficient operation of your Lennox furnace.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms\u003c\/strong\u003e include cracks or rust on the exchanger, a burner flame that shifts or flutters when the blower runs, unusual odors, soot accumulation, and carbon monoxide detector activation. A damaged heat exchanger can let combustion gases enter your living space and should be inspected and replaced without delay by a qualified technician.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The \u003cstrong\u003e70W07\u003c\/strong\u003e is built to Lennox's exact specifications for materials, weld quality, and airflow design — precision that aftermarket parts frequently fail to match. Non-OEM components can compromise the combustion seal, lower heating efficiency, and void your equipment warranty. Choosing the authentic Lennox part guarantees a correct fit and restores factory-rated safety and performance. Installation should be handled by a licensed HVAC professional.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081066103155,"sku":"LNX-70W07","price":39.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-70w07","provider":"National HVAC Parts","version":"1.0","type":"link"}