OEM Lennox Heat Exchanger Assembly — 76M62

The genuine OEM Lennox 76M62 heat exchanger assembly is the core combustion component of your gas furnace, transferring heat from burning fuel to the circulating air while keeping combustion gases completely separate from your home's airflow. Engineered to exact Lennox specifications, it delivers the rated efficiency and safe operation your furnace was designed to provide.

A failing heat exchanger often shows itself through cracks, rust or corrosion, soot buildup, a flickering or discolored burner flame, or unusual smells during operation. Because a compromised heat exchanger can allow carbon monoxide to enter the airstream, it is a safety-critical part that should be replaced promptly with a factory component.

Choosing OEM matters here more than anywhere else in the furnace. The 76M62 is built to the precise dimensions, alloy, and pressure tolerances of your Lennox equipment, ensuring a proper seal, correct airflow, and full compatibility that aftermarket parts cannot reliably guarantee. Protect your system's warranty, efficiency, and — most importantly — your family's safety with the genuine Lennox replacement.