Ice maker will not run, no ice production, control panel shows E01

Safety first: Disconnect the ice maker from mains power (unplug or switch off circuit breaker) before removing any panels.

Steps to try:

• Power reset: Leave the unit unplugged for at least 5–10 minutes to discharge the control board, then reconnect power and check if E01 clears.
• Check supply voltage: Verify the wall outlet or dedicated socket provides stable 220–240 V AC using a multimeter. Low or fluctuating voltage can trigger communication errors.
• Inspect control board connections: Remove the top or rear service panel to access the Neff main control module. Check all multi‑pin connectors for secure fit, corrosion, or heat damage. Reseat each plug firmly.
• Look for board damage: Examine the PCB for burnt components, bulged capacitors, or darkened areas. If present, the board is likely defective.

When to stop: If E01 returns immediately after reset and wiring is intact, the main control module likely needs replacement. This involves handling live‑voltage circuits; if you are not experienced, contact a qualified Neff service technician.