Dehumidifier runs but collects very little or no water even in a humid room.

Safety: Unplug the unit before cleaning or opening panels.

• Check humidity and temperature: Ensure the room is actually humid (above ~50% RH) and within the operating temperature range. In cool, dry conditions, little water will be collected.
• Clean filter and coils: Remove and wash the air filter. Vacuum dust from the evaporator and condenser coils using a soft brush attachment.
• Verify fan operation: Turn the unit on and confirm the fan runs at full speed. A weak or non-running fan will reduce performance.
• Check for icing: Inspect the evaporator for ice buildup. If present, improve airflow and ensure room temperature is not too low.
• Sealed system issues: If airflow is good and coils are clean but performance remains poor, the unit may have low refrigerant or a weak compressor. This requires professional diagnosis and may not be economical to repair on smaller units.