Devola dehumidifier displays HI and may run continuously.

Safety: Ensure adequate ventilation around the unit.

HI indicates the ambient temperature is very high or the sensor is reading excessively high.

• Measure room temperature: Use a separate thermometer. If the room is above the Devola maximum (often ~32–35°C), relocate the unit to a cooler area.
• Improve airflow: Ensure the inlet and outlet grilles are not blocked and that the unit has the recommended clearance.
• Check and clean filter: A clogged filter can cause internal heat buildup. Wash and dry the filter before reinstalling.
• Sensor fault: If HI appears in a normal-temperature room, inspect and possibly replace the ambient NTC sensor.