Homedics dehumidifier displays F3 and will not run the compressor.

Safety: Unplug the unit. Compressor and high-voltage work should be done by a qualified technician.

Basic checks:

• Ventilation: Ensure the unit has adequate clearance and is not in a confined space causing overheating.
• Power supply: Plug directly into a dedicated wall outlet. Avoid extension cords.
• Listen for compressor: When turned on, listen for a brief hum or click from the compressor. Repeated clicking without running suggests overload tripping.
• Professional diagnosis: F3 typically indicates a serious compressor or control issue. A technician can test compressor windings, start components, and board outputs. In many small dehumidifiers, compressor or sealed system failure is not economical to repair.