{"product_id":"oem-lennox-heat-exchanger-assembly-57l31","title":"OEM Lennox Heat Exchanger Assembly — 57L31","description":"\u003cp\u003eThe OEM Lennox \u003cstrong\u003e57L31\u003c\/strong\u003e heat exchanger assembly moves heat from the furnace burners into the circulating air while sealing combustion byproducts away from your indoor air. Manufactured to exact Lennox tolerances, it fits and seals correctly in compatible furnace platforms so your system heats efficiently and safely.\u003c\/p\u003e\u003cp\u003eCommon signs that the heat exchanger needs replacing include cracks or corrosion on the exchanger surface, a burner flame that pulls or flutters when the blower runs, soot deposits, strange smells during operation, or repeated limit-switch shutdowns. Any of these can indicate a breach that risks carbon monoxide exposure, making prompt replacement essential.\u003c\/p\u003e\u003cp\u003eOEM is the only safe choice for a combustion component. The genuine Lennox \u003cstrong\u003e57L31\u003c\/strong\u003e uses the correct metallurgy and forming to survive constant heating and cooling cycles and to mate perfectly with the burner assembly. Off-brand parts may not hold the seal or the thermal load, jeopardizing safety, efficiency, and your Lennox warranty.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081068233075,"sku":"LNX-57L31","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-57l31","provider":"National HVAC Parts","version":"1.0","type":"link"}