{"product_id":"oem-lennox-heat-exchanger-assembly-70w11","title":"OEM Lennox Heat Exchanger Assembly — 70W11","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e70W11\u003c\/strong\u003e heat exchanger assembly (interchanges 605731-06 and 604904-11) is a factory-specified component for your Lennox gas furnace. The heat exchanger transfers heat from the combustion process into your home's supply air while safely isolating flue gases from the airstream, making it central to both the efficiency and safety of the furnace.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Typical signs of a worn exchanger include a burner flame that flutters or changes shape when the blower runs, rust or corrosion, visible cracks or pinholes, soot, odd smells during operation, and nuisance trips of the limit or flame-rollout safety switches. Because a cracked exchanger can release carbon monoxide, replacement should not be delayed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e This is a sealed, combustion-critical part where exact fit and material integrity protect your family. The genuine Lennox \u003cstrong\u003e70W11\u003c\/strong\u003e is manufactured to original dimensions and specifications, ensuring a leak-tight installation, proper airflow, and continued warranty coverage. Choose the OEM assembly for a reliable, code-compliant repair.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081064268147,"sku":"LNX-70W11","price":39.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-70w11","provider":"National HVAC Parts","version":"1.0","type":"link"}