OEM Lennox Heat Exchanger Assembly — 14D62

The genuine OEM Lennox 14D62 heat exchanger assembly (also referenced by factory numbers 612998-13 and 610280-20) is the primary combustion component in your Lennox gas furnace. It transfers heat from the burners into the circulating air while keeping flue gases isolated from your home's air supply. As a direct factory replacement, the 14D62 is built to the exact alloy, weld, and dimensional standards Lennox specified for your furnace.

Watch for failure symptoms such as cracks or rust on the exchanger surface, a wavering or rolling burner flame, soot accumulation, a burning or metallic odor when heating, high-limit trips, or carbon monoxide alarms. A compromised heat exchanger poses a serious safety risk and warrants prompt replacement.

Installing the OEM Lennox 14D62 is critical because it is a life-safety part. Universal or aftermarket exchangers may not seal to Lennox tolerances, can crack early under repeated heating cycles, and typically void the manufacturer's warranty. This authorized assembly restores proper heat transfer, airflow, and safe combustion so your Lennox furnace runs to factory specification.