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The genuine OEM Lennox 96M84 heat exchanger assembly ships complete with its integrated vest panel, providing the heat-transfer cells plus the structural front panel that seals the combustion area and mounts the burner box in your Lennox gas furnace. Supplying the exchanger and vest panel as a matched unit ensures precise alignment between the burners, cells, and cabinet — the arrangement Lennox depends on for safe, efficient, and quiet operation.
Common failure symptoms: Indicators of a failed heat exchanger include visible cracks or corrosion in the cells, flame rollout or a wavering burner flame, popping or booming sounds at ignition, rust and scale accumulation, soot, or a triggered carbon monoxide alarm. Warped or damaged vest panels can also cause air leaks and combustion problems. Prompt replacement is essential for household safety.
Why OEM matters: The 96M84 assembly is manufactured to Lennox's exact cell geometry and panel dimensions, guaranteeing a leak-free seal and correct burner clearances. Aftermarket alternatives frequently fail to match the vest-panel mounting points and combustion tolerances, risking improper fit, reduced efficiency, and warranty loss. The OEM unit restores factory-rated performance and safety. Installation should be performed by a qualified HVAC technician.