OEM Lennox Heat Exchanger Assembly — 19A60

The genuine OEM Lennox 19A60 heat exchanger assembly is the core combustion component of your Lennox gas furnace. It transfers heat from the burning gas to the air moving through your ductwork while keeping combustion byproducts safely separated from your breathing air. Because it is a direct factory part, the 19A60 matches the exact dimensions, alloy, and pressure tolerances Lennox engineered for your furnace model.

A failing heat exchanger typically shows up as visible cracks or rust, a flickering or rolling burner flame, soot buildup, a strong odor when the furnace runs, or a furnace that repeatedly trips on the high-limit or flame-rollout switch. A cracked exchanger can allow carbon monoxide to enter the home, so replacement should never be delayed.

Using the OEM Lennox 19A60 matters because heat exchangers are safety-critical. Aftermarket or universal substitutes may not seal correctly, can fail prematurely under thermal cycling, and often void your Lennox warranty. This factory-authorized assembly restores rated efficiency, proper airflow, and safe operation, giving you and your technician confidence that the repair meets Lennox specifications.