Washer shows F16, drum does not rotate, often on models with electronic motor control.

Safety: Unplug the washer before any internal inspection.

• Check drum for obstruction: Ensure no foreign object is jammed between drum and tub by rotating the drum by hand.
• Inspect motor wiring: Remove rear panel and verify the motor connector is secure and wires are intact.
• Allow cool-down: If the washer was heavily loaded or used repeatedly, let it cool for 30 minutes and retry; thermal protection may have tripped.
• Advanced testing: Motor winding resistance and insulation should be checked with appropriate instruments by a professional.

F16 usually indicates a serious motor or inverter fault; contact a qualified technician for diagnosis and possible board/motor replacement.