FieldBench
Goodman codes

Goodman

b5

Lockout

Locked rotor

Blower cannot turn.

Walk b5 in Diagnose

Sign in for the next measurement

First check

1 Is the wheel free?

Spin the Goodman GMVC96 blower by hand. Ice, debris, or a seized bearing is not a control problem. Confirm the motor type on this plate — serial ECM, 9-speed tap, or X-13 — before you grab a capacitor. Spin the wheel by hand. Ice, debris, seized bearing.

Expect: Wheel free. Correct motor family for this IFC.

The rest of the walkthrough is Diagnose.

On the plates

  • Spin the wheel by hand. Ice, debris, seized bearing.
  • Capacitor is not the play — this is a serial ECM.

Plates that use b5