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The Goodman 4821401S Heat Exchanger is a genuine OEM 14 inch, 3-cell combustion component built for the GMNT060-3 and compatible Goodman/Amana gas furnaces. The heat exchanger transfers heat from the burner flames to the circulating air stream while keeping combustion gases fully separated from the conditioned airflow. It is the single most safety-critical part in a gas furnace — a cracked or corroded exchanger can leak carbon monoxide.
Heat exchangers must match burner spacing, cell geometry, and combustion airflow exactly. Only the genuine Goodman 4821401S guarantees proper flame alignment, correct temperature rise, and the metallurgy required for safe, long-life operation. Non-OEM exchangers risk flame impingement, premature cracking, and CO hazards — and typically void warranty coverage.
Difficulty: Advanced — professional required (2–4 hrs). Replacement involves removing burners, gas manifold, and often the blower deck, followed by combustion analysis and a mandatory CO/leak check. This is a safety-critical repair and must be performed by a licensed HVAC technician.
Replace a failed exchanger and restore safe heating to your Goodman GMNT060-3 with the genuine 4821401S.