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The Goodman B1376857 Motor Mount Arm is the OEM condenser fan motor mounting bracket for the APH1543M41AC packaged heat pump. This stamped-steel support arm secures the condenser fan motor to the top grille assembly, holding the motor and blade in correct alignment for balanced, vibration-free operation. Mount arms are commonly replaced when they rust through, crack, or bend after a motor failure or blade strike — a weak or broken arm lets the motor sag and the blade rub the shroud.
The OEM B1376857 has the exact bolt-hole pattern, arm length, and offset to position the motor at the correct height and blade depth. Generic or bent-to-fit brackets risk misalignment, blade contact, and premature motor bearing wear. At this low price, OEM is the obvious choice.
Disconnect power, unbolt the motor from the old arm, swap the arm, and re-secure the motor — no refrigerant work required. A basic DIY job with hand tools; verify the blade spins freely with proper shroud clearance before restoring power.