Devola dehumidifier displays CF after long use; unit may still run.

Safety: Turn off and unplug the unit before removing the filter.

CF is usually a reminder to clean the air filter.

• Remove and clean filter: Slide out the air filter from the rear or front grille. Wash it with warm water and mild detergent. Rinse thoroughly and allow it to dry completely.
• Vacuum coil area: While the filter is out, gently vacuum dust from the evaporator coil fins without bending them.
• Reset indicator: Reinstall the filter and follow your Devola manual to reset the CF indicator (often by holding the Filter or Timer button for several seconds).