What to do if my Aircare 4DTS 900 is showing alternating “CF” and room humidity?
- JJoshua JohnsonAug 17, 2025
If your Aircare Humidifier is displaying an alternating “CF” and room humidity message, the wick may be dirty, so replace it if needed. You can also try unplugging the unit for 30 seconds and then plugging it back in to clear the display.