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Genuine OEM Lennox 14D64 heat exchanger assembly, cross-referenced to Lennox part numbers 612998-15 and 610280-22. This assembly moves heat from the burner combustion into your home's circulating air while containing the flue gases, making it fundamental to both the safety and the heating performance of your Lennox furnace.
Common failure symptoms: Telltale signs of a failing exchanger include visible cracks or corrosion, flame rollout or a distorted, dancing burner flame, expansion-related popping or rattling sounds, soot near the burners, and a tripped carbon monoxide detector. Declining heat output and rising energy costs frequently accompany a cracked or deteriorating heat exchanger.
Why OEM matters: Heat exchangers are safety-critical and model-specific, engineered to tight tolerances for correct sealing and gas separation. The factory-original 14D64 is built to exact Lennox specifications so it fits precisely and maintains proper combustion efficiency. Aftermarket alternatives can seal improperly and fail prematurely, risking dangerous flue leaks. Choosing OEM protects your family and helps preserve your furnace's warranty and performance.