Unit makes a buzzing or humming noise but does not start making ice.

Safety first: Unplug the unit immediately if you hear loud humming from the compressor area.

• Check voltage and extension cords: Plug the unit directly into a properly grounded outlet. Avoid long or thin extension cords.
• Identify noise source: Determine whether the hum comes from the compressor (rear bottom) or pump (under reservoir).
• Replace start relay: If the compressor hums and then clicks off, replace the compressor start relay and overload protector.
• Inspect pump: If the hum is from the pump and no water moves, clean or replace the water circulation pump.
• Professional help: If a new relay does not start the compressor, the compressor may be mechanically locked and require professional replacement.