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The Goodman B1376853 Motor Mount Arm is a genuine OEM replacement bracket designed to secure the blower motor assembly inside Goodman/Amana WMAHV1200ABA wall-mount air handlers. The mount arm holds the motor in correct alignment with the blower housing, preventing vibration, rubbing, and premature bearing wear. A bent, cracked, or corroded mount arm is a common cause of noisy operation and should be replaced with an exact-fit OEM part.
This OEM Goodman mount arm matches the factory mounting-hole pattern and motor band geometry exactly, so the blower motor seats square the first time. Generic or fabricated brackets often require drilling and shimming, which can throw off motor-to-wheel clearance and introduce vibration. For a structural part like a motor mount, the OEM piece is the safe, no-guesswork choice.
Easy (2/5). Disconnect power at the breaker, remove the blower assembly, transfer the motor to the new mount arm, and reinstall. Basic hand tools only. Always verify motor clearance before restoring power. If you are not comfortable working inside an energized air handler, contact a licensed HVAC technician.