Dehumidifier displays "CF" after a set number of hours; unit may continue to run but indicates maintenance is needed.

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

Steps:

• Remove filter: Slide out the air filter from the rear or side of the unit according to the user manual.
• Clean filter: Vacuum loose dust, then wash with mild soap and lukewarm water. Rinse thoroughly and allow to dry completely before reinstalling.
• Clean grilles: Wipe down intake and exhaust grilles to remove dust buildup.
• Reset indicator: Press and hold the filter reset or timer button (varies by model) for 3–5 seconds until CF clears from the display.

Note: CF is not a fault code; it is a reminder. Regular filter cleaning improves efficiency and prevents other error codes.