The humidity level setting is too high.
⦁ Decrease the humidity level setting.
A door or window is open, letting in new moisture.
⦁ Make sure all windows or doors to the outside are closed and tightly sealed.
There are other sources of humidity in the room (e.g. boiling water in pot, washer/dryer, water boiler/water heater).
⦁ Switch on the dehumidifier when these sources are not present.
The temperature in the room is too low.
⦁ The dehumidifier is designed to operate between 41°F (5°C) and 89°F (32°C). Moisture removal is greatly reduced if room temperatures exceed this temperature range.
The dust filter is dirty/ blocked.
⦁ Clean the dust filter.
Air outlet or intake is blocked.
⦁ Remove blockage.