{"product_id":"oem-lennox-heat-exchanger-assembly-14k84","title":"OEM Lennox Heat Exchanger Assembly — 14K84","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e14K84\u003c\/strong\u003e heat exchanger assembly — also referenced by Lennox part numbers 614580-59 and 612993-03 — is the heart of your furnace's heating cycle. It absorbs heat from the burners and passes it to the blower air while sealing dangerous combustion byproducts away from your home's airstream. It is manufactured to Lennox's exact fit, alloy, and pressure specifications for dependable, long-term operation.\u003c\/p\u003e\u003cp\u003eTelltale symptoms of a bad heat exchanger include stress cracks, rust and scale, a burner flame that flutters or changes shape when the blower engages, soot accumulation, unusual smells, or a tripped carbon monoxide detector. Because these conditions can allow CO to circulate through the house, replacement should not be delayed.\u003c\/p\u003e\u003cp\u003eFor Lennox equipment, OEM is the right call. The \u003cstrong\u003e14K84\u003c\/strong\u003e matches the original component's thickness, weld construction, and mounting geometry, so it installs cleanly and restores factory efficiency and safety. Aftermarket units often compromise on materials and tolerances, leading to poor performance, premature failure, and potential warranty issues.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081074458995,"sku":"LNX-14K84","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-14k84","provider":"National HVAC Parts","version":"1.0","type":"link"}