Washer fills but does not start drum movement; display shows D03 and cycle aborts.

Safety first: Unplug the washer and wait several minutes before accessing internal components.

Access the motor:

• Remove the rear panel of the Brandt washer.
• Locate the drive motor under the drum, connected by a belt.

Check the belt:

• Ensure the drive belt is on both the motor pulley and drum pulley and is not shredded or excessively loose.

Inspect motor brushes (if fitted):

• Remove the motor by undoing mounting bolts and disconnecting the wiring plug.
• Remove the carbon brush holders from each side of the motor.
• Measure brush length; if less than ~1 cm, replace both brushes with compatible Brandt motor brushes.

Check tachometer:

• At the rear of the motor, inspect the tachometer coil and magnet ring for damage or looseness.
• Measure resistance of the tach coil; if open circuit or far from spec, replace the motor or tach assembly (depending on design).

Wiring and PCB:

• Inspect the motor harness from motor to PCB for burns or broken conductors.
• Reseat connectors on the main control board.

Reassemble, plug in, and run a spin test. If D03 persists with a known-good motor and wiring, the main PCB triac or control logic is likely faulty and should be replaced by a qualified technician.