{"product_id":"oem-lennox-heat-exchanger-assembly-70w13","title":"OEM Lennox Heat Exchanger Assembly — 70W13","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e70W13\u003c\/strong\u003e heat exchanger assembly (factory references 605731-08 and 604904-13) is a precision furnace component that moves combustion heat into your home's airstream while keeping exhaust gases safely contained. Manufactured to Lennox specifications, it ensures the exact fit and heat-transfer performance your equipment was designed around.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e cracks, rust, or pinholes in the metal, soot accumulation, flame rollout, a burner flame that flickers when the blower starts, unusual odors, or carbon monoxide detector activation. These are signs the assembly has degraded and needs prompt replacement for safe operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The heat exchanger carries combustion byproducts, so an exact factory match is critical for safety and longevity. The genuine Lennox \u003cstrong\u003e70W13\u003c\/strong\u003e is built with the correct materials and construction to endure constant thermal cycling and maintain a gas-tight seal. Aftermarket alternatives risk poor fit, early failure, and warranty issues — install OEM to keep your Lennox furnace running safely and efficiently.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081064628595,"sku":"LNX-70W13","price":39.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-70w13","provider":"National HVAC Parts","version":"1.0","type":"link"}