FieldBench
Amana codes

Amana

b4 / b5

Lockout

Motor trip / locked rotor

b4 = lost rotor or overload trip. b5 = locked rotor after 10 start attempts.

Walk b4 / b5 in Diagnose

Sign in for the next measurement

First check

1 Is the wheel free?

Spin the Amana AVPTC 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. Wheel rub, debris, seized bearings.

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

The rest of the walkthrough is Diagnose.

On the plates

  • Wheel rub, debris, seized bearings.
  • Static so high the motor cannot start the wheel.
  • Filter / coil / return before you shotgun the motor.

Plates that use b4 / b5