Daikin Mini Split Error Code AF: How to Fix It

Q: Can I run my Daikin mini split without the humidifier function?

Yes, the error code AF will not prevent normal cooling or heating. You can disable the humidifier mode in the settings or simply ignore the error if you don't need humidification.

Q: How often should I replace the humidifier pad?

Humidifier pads should be replaced every 1-3 months depending on usage and water hardness. Signs include mineral buildup, reduced airflow, or a musty odor.

Q: What causes error code AF to appear?

The most common causes are a clogged or worn-out humidifier pad, insufficient water supply, a stuck float valve, or a faulty solenoid valve or control board.

Q: Is a Daikin humidifier fault covered under warranty?

If the unit is still under warranty (typically 5-10 years for parts), the humidifier components may be covered. Contact Daikin or your installer for warranty service.

Q: Can hard water cause error AF?

Yes, hard water can cause mineral buildup on the humidifier pad and in the water tray, leading to clogs and error AF. Using distilled water or a water softener can help.

Abstract

Error code AF on your Daikin mini split indicates a humidifier fault. This means the built-in or connected humidifier is not working properly. The issue is usually related to the humidifier pad, water supply, or electrical components. Follow these steps to diagnose and resolve the problem.