Dehumidifier shows normal operation but ice builds up on the evaporator coil

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

• Step 1 – Move to warmer area: Ensure the room temperature is above 15°C (59°F). Operating in colder rooms promotes icing.
• Step 2 – Clean filter and grilles: Wash the air filter and vacuum dust from grilles to restore airflow.
• Step 3 – Manual defrost: Turn the unit off and leave it unplugged with the cover removed until all ice melts. Place towels to catch water.
• Step 4 – Check defrost sensor (advanced): Inspect the evaporator thermistor and wiring. A faulty sensor can prevent proper defrost cycles.
• Step 5 – Monitor operation: After defrosting and cleaning, run the unit and watch for recurring ice. Persistent icing may indicate low refrigerant or control issues.

When to call a technician: If icing returns quickly in a warm room with clean airflow, have a technician check the sealed system and defrost control.