{"product_id":"oem-lennox-heat-exchanger-r37987d001-33h59","title":"OEM Lennox Heat Exchanger R37987D001 — 33H59","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e33H59\u003c\/strong\u003e heat exchanger, also referenced as \u003cstrong\u003eR37987D001\u003c\/strong\u003e, is the core heat-transfer component of your Lennox gas furnace. It moves heat from the combustion chamber into the blower-driven air stream while safely containing and venting flue gases away from your living space. Engineered to precise Lennox specifications, the \u003cstrong\u003e33H59\u003c\/strong\u003e ensures proper fit, airflow, and efficient, safe operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Common indicators of exchanger failure include rust flakes and corrosion, visible cracks, a yellow or unstable burner flame, soot deposits, and popping or rumbling noises at ignition. A cracked exchanger may also trip the limit switch, cause short cycling, and trigger carbon monoxide detectors — a serious safety concern.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Because the heat exchanger keeps combustion gases separated from the air you breathe, it demands OEM-grade materials and construction. Only the authentic Lennox \u003cstrong\u003e33H59\u003c\/strong\u003e \/ \u003cstrong\u003eR37987D001\u003c\/strong\u003e guarantees the factory-specified steel, weld integrity, and dimensions needed for a correct, safe fit and continued warranty coverage. Replacement should always be performed by a qualified HVAC technician.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081064530291,"sku":"LNX-33H59","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-r37987d001-33h59","provider":"National HVAC Parts","version":"1.0","type":"link"}