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The Goodman B1376857 Motor Mount Arm is a genuine OEM support bracket engineered for the APH1336M41CA packaged heat pump. This arm secures the blower or fan motor to the unit chassis, holding the motor in precise alignment so the shaft, bearings, and blower wheel spin true. A worn, cracked, or corroded mount arm causes vibration, noise, and premature motor failure — replacing it with the correct OEM part restores quiet, stable operation.
OEM vs. Generic: The genuine Goodman B1376857 is stamped to exact factory tolerances so bolt holes, band diameter, and mounting geometry line up on the first try. Generic or fabricated brackets often require drilling or shimming and can leave the motor misaligned, which shortens bearing life. For a lasting, vibration-free repair we recommend the OEM arm.
Install Difficulty: Easy to Moderate — a common repair for an HVAC technician or an experienced DIYer. Requires disconnecting power, removing the blower assembly, transferring the motor to the new arm, and torquing the mount bolts. Typical job time is 30–45 minutes. Always shut off power at the disconnect before servicing.