{"product_id":"oem-lennox-heat-exchanger-assembly-12y79","title":"OEM Lennox Heat Exchanger Assembly — 12Y79","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e12Y79\u003c\/strong\u003e heat exchanger assembly — also cross-referenced as 614580-02 and superseding 612983-04 — is responsible for transferring heat from the combustion chamber to your home's supply air while isolating flue gases from the airstream. Built to original Lennox specifications, it drops into your furnace with the correct dimensions, mounting points, and gas-tight construction.\u003c\/p\u003e\u003cp\u003eCommon signs that this assembly needs replacement include visible cracking or rust-through, soot buildup, a burner flame that flickers or rolls out, unusual odors, or a triggered carbon monoxide alarm. Because these symptoms involve combustion byproducts, prompt replacement is a safety priority.\u003c\/p\u003e\u003cp\u003eWhy OEM matters: matching the exact part is critical when superseded numbers are involved — the \u003cstrong\u003e12Y79\u003c\/strong\u003e reflects Lennox's updated, correct revision, so you avoid the fitment and sealing problems that come with obsolete or aftermarket parts. Genuine construction preserves rated efficiency and any remaining Lennox warranty coverage. For a reliable, code-compliant furnace repair, install the factory assembly.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081074098547,"sku":"LNX-12Y79","price":39.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-12y79","provider":"National HVAC Parts","version":"1.0","type":"link"}