FieldBench
Amana codes

Amana

b4 / b5 / b7

Lockout

Motor trip / locked rotor / failed start

b4 = lost rotor or overload trip (shuts down and retries). b5 = locked rotor after 10 start attempts. b7 = motor parameters missing or failed to start after 40 attempts.

Walk b4 / b5 / b7 in Diagnose

3 plates — walk the one on the cabinet

First check

1 Is the wheel free?

Spin the Amana AMVC96 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 in the housing, 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 — prove TES before a motor.
  • Harness intermittents look like b7. Prove the 14-pin before a motor or IFC.
  • Wheel rub, debris in the housing, seized bearings.
  • Static so high the motor cannot start the wheel.
  • Adjacent b-codes on some door cards are the same family — same harness/static/motor path.

Plates that use b4 / b5 / b7

Same number, other makers

b4 / b5 / b7 on Amana is not the same code on these plates.