{"product_id":"oem-lennox-heat-exchanger-assembly-13x31","title":"OEM Lennox Heat Exchanger Assembly — 13X31","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e13X31\u003c\/strong\u003e heat exchanger assembly (factory reference 612222-06) is the core heating component in your Lennox gas furnace. It transfers combustion heat to the blower air stream while keeping flue gases sealed and safely exhausted, providing efficient, comfortable warmth throughout your home.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A deteriorating heat exchanger often reveals itself through a distorted or flaring burner flame, cracks, rust, or scaling on the metal, loud popping and pinging during startup and shutdown, soot accumulation, and frequent high-limit shutdowns and short-cycling. Because cracks can leak carbon monoxide, timely replacement is critical for household safety.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The \u003cstrong\u003e13X31\u003c\/strong\u003e is produced to Lennox's exact gauge, geometry, and burner-alignment standards so it fits and seals precisely. Generic substitutes can undermine combustion sealing, lower efficiency, and void your furnace warranty. Choosing the authentic Lennox part guarantees a factory-correct fit, rated efficiency, and safe, reliable operation for years to come. Professional installation is strongly recommended.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081070559603,"sku":"LNX-13X31","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-13x31","provider":"National HVAC Parts","version":"1.0","type":"link"}