{"product_id":"oem-lennox-heat-exchanger-assembly-33m66","title":"OEM Lennox Heat Exchanger Assembly — 33M66","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e33M66\u003c\/strong\u003e heat exchanger assembly (factory number LB-94782X) is the central heating and safety component of your Lennox gas furnace. It moves heat from the combustion burners into the air circulating through your home while keeping flue gases fully separated from that air. Built to Lennox factory standards, the \u003cstrong\u003e33M66\u003c\/strong\u003e delivers the exact fit, alloy, and structural integrity your furnace was designed around.\u003c\/p\u003e\u003cp\u003eSigns of a failing heat exchanger include cracks or rust on the metal surface, a flickering or rolling burner flame, soot deposits, a metallic or burning smell during operation, frequent high-limit trips, and carbon monoxide alarms. Any of these indicate the exchanger may no longer contain combustion byproducts safely and should be replaced without delay.\u003c\/p\u003e\u003cp\u003eChoosing the OEM Lennox \u003cstrong\u003e33M66\u003c\/strong\u003e is essential because heat exchangers are safety-critical. Generic or universal parts may not seal to Lennox tolerances, can crack prematurely under thermal stress, and often void your warranty. This factory-authorized assembly restores proper heat transfer, correct airflow, and safe combustion so your Lennox furnace operates exactly as intended.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081066430835,"sku":"LNX-33M66","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-33m66","provider":"National HVAC Parts","version":"1.0","type":"link"}