Washer-dryer will not start; display shows F01 or cycle stops immediately after pressing start.

Safety first: Unplug the appliance and turn off the water supply before any work. Do not work on live circuits.

Step-by-step checks:

• Power reset: Disconnect power for 5–10 minutes, then reconnect and try a short cycle. If F01 returns immediately, continue below.
• Inspect motor connector: Remove the rear panel. Locate the drive motor at the bottom of the tub. Check the multi-pin connector for burning, corrosion, or loose pins. Reseat the connector firmly.
• Check motor windings: With a multimeter set to ohms, measure resistance between motor terminals. Compare to Ariston service specs (typically a few ohms per winding). If windings are shorted (near 0 Ω) or open (OL), the motor is faulty.
• Inspect wiring harness: Trace the harness from the motor to the main control board (power module). Look for chafed insulation, burn marks, or broken wires. Repair or replace damaged wiring.
• Examine control board: Access the top or rear control area and remove the PCB cover. Look for a burned triac or scorched areas near the motor drive section. If present, the board must be replaced.

When to call a technician: If you confirm motor winding damage or a burned triac on the PCB, replacement requires correct Ariston parts and careful handling of mains circuitry. This is best done by a qualified technician.