Dehumidifier runs but room humidity does not decrease

Safety: Turn off and unplug before cleaning.

Steps:

• Clean filter and grilles: Remove and clean the air filter. Vacuum dust from intake and exhaust grilles.
• Check room conditions: Close windows and doors. Reduce other moisture sources (e.g., boiling water, drying clothes indoors).
• Check for icing: Inspect the evaporator coil while running. If it is heavily iced, turn the unit off and let it defrost completely. Ensure the room is warm enough and airflow is not blocked.
• Verify capacity: Compare the dehumidifier’s rated capacity (liters/day) to the room size and humidity load. If undersized, consider an additional or larger unit.
• If performance remains poor: The refrigeration system may be weak (low refrigerant) or the humidity sensor may be misreading. Professional service is recommended.