{"product_id":"oem-lennox-heat-exchanger-assembly-28j66","title":"OEM Lennox Heat Exchanger Assembly — 28J66","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e28J66\u003c\/strong\u003e heat exchanger assembly is the primary heat-transfer component in your Lennox gas furnace. It captures the heat produced during combustion and passes it to the circulating supply air while keeping combustion byproducts sealed away from the home's air, ensuring both comfort and safe operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Indications that the \u003cstrong\u003e28J66\u003c\/strong\u003e needs replacement include visible cracks or corrosion, rust flakes near the burner area, a burner flame that flutters or changes shape when the blower runs, unusual smells, and repeated tripping of the rollout or high-limit safety switches. Because these conditions can permit carbon monoxide leakage, timely replacement is essential.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Lennox designs each furnace around precisely toleranced parts, and the \u003cstrong\u003e28J66\u003c\/strong\u003e is manufactured to those exact original specifications for correct combustion clearance, airflow, and fit. Aftermarket substitutes can compromise efficiency and safety. The OEM assembly maintains your warranty coverage and restores dependable, code-compliant heating performance.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081064137075,"sku":"LNX-28J66","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-28j66","provider":"National HVAC Parts","version":"1.0","type":"link"}