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The Goodman 1439389S Blower Housing is a genuine OEM 9" x 6" scroll housing for GUP040-2 gas furnaces. The housing surrounds the blower wheel and channels conditioned air into the supply plenum at the correct velocity and static pressure. A rusted, dented, or cracked housing causes air leakage, noise, and reduced CFM. Replacing it with the exact OEM housing restores designed airflow and quiet operation.
The genuine 1439389S is sized to the GUP040-2 blower wheel and motor cradle, so the wheel clearance and cutoff plate geometry match factory spec. Aftermarket housings often differ slightly in the wheel bore or mounting flange, causing air whistle or wheel rub. OEM gives you a true bolt-in fit and correct airflow.
Moderate (3 of 5). Roughly 45–60 minutes. Requires pulling the blower assembly, transferring the wheel and motor, and re-setting wheel clearance. Handle the wheel carefully to avoid unbalancing it. A licensed technician is recommended if you're not comfortable removing the blower deck.