{"product_id":"oem-lennox-heat-exchanger-assembly-33m08","title":"OEM Lennox Heat Exchanger Assembly — 33M08","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e33M08\u003c\/strong\u003e heat exchanger assembly is the core component that transfers combustion heat to the air moving through your furnace while keeping flue gases safely separated from your home's air supply. Engineered to exact Lennox specifications, this assembly restores rated heating output and maintains the airtight barrier your system depends on for safe operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing heat exchanger often shows up as visible cracks or rust, a flickering or rolling burner flame, soot buildup, a persistent smell of combustion, or a furnace that repeatedly shuts down on the safety limit. In many cases, elevated carbon monoxide readings are the first warning sign that replacement is required.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The heat exchanger is a safety-critical part, and dimensional accuracy is non-negotiable. The OEM Lennox \u003cstrong\u003e33M08\u003c\/strong\u003e is built from the same alloy, gauge, and forming tolerances as the original, ensuring a proper seal, correct heat transfer, and full compatibility with your furnace's burner and blower design. Aftermarket substitutes can compromise the flue seal and void your equipment warranty. Choose the factory part for a reliable, code-compliant repair.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081072722291,"sku":"LNX-33M08","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-33m08","provider":"National HVAC Parts","version":"1.0","type":"link"}