Venta dehumidifier displays F8 and stops, sometimes with unusual compressor noise

Safety: Unplug the unit. Refrigerant system work must be done by certified technicians.

• Visual inspection: Check for oil stains on refrigerant tubing and joints, which can indicate a leak.
• Airflow and cleanliness: Ensure the evaporator and condenser coils are clean and the fan is operating correctly. Poor airflow can cause abnormal pressures.
• Do not attempt to recharge: Do not try to add refrigerant yourself. Venta units are sealed systems and require proper recovery, leak detection, and recharging equipment.
• Professional service: If F8 persists, contact a refrigeration technician to check system pressures, locate leaks, and repair or recharge the system as needed. The pressure switch/sensor may also need replacement.