How to Fix / Troubleshooting

Safety: Unplug the unit before defrosting. Do not chip ice with sharp tools.

Steps:

Defrost: Turn off and unplug the unit. Allow all ice to melt naturally. Place towels under the unit to catch water.
Clean filter and coils: Wash the air filter and gently vacuum dust from the evaporator and condenser coils.
Check room temperature: Ensure the room is within the recommended operating range. Move the unit to a warmer room if necessary.
Verify fan operation: Confirm the fan runs at full speed and is not obstructed.
Monitor after restart: Plug in and run the unit. If icing returns quickly in a warm room with clean filters, there may be a refrigerant or defrost control issue.
Service: Persistent icing often indicates low refrigerant or a faulty defrost sensor, which should be diagnosed by a professional.

Dehumidifier ices up; evaporator coil covered in thick ice and airflow is reduced.

Possible Causes