ErrorCodeDoctor
Daikin Air Conditioner C6 error code
The C6 error means your Daikin air conditioner detected a fault with the indoor unit fan motor sensor or fan control driver PCB. This can also be caused by a defective connection of the capacity setting adaptor or an incorrect field setting. Contact a qualified technician.
Common causes
- Defective fan PCB
- Defective connection of the capacity setting adaptor
- Incorrect field setting
How to fix it
-
1
Contact a qualified technician to inspect the fan PCB, capacity setting adaptor connection, and field settings
Related Daikin Air Conditioner error codes
A0
An external protection device connected to the indoor unit has been activated
A1
A fault was detected in the indoor unit PCB (control board)
A3
The drain level control system has detected an abnormality — drain may be clogged
A5
Freeze-up protection (cooling) or high pressure control (heating) has activated — check the air filter
C6 error — frequently asked questions
What does the C6 error mean on a Daikin air conditioner?
The fan motor sensor or fan control driver has a fault
What causes the C6 error?
The C6 error is usually caused by: Defective fan PCB; Defective connection of the capacity setting adaptor; Incorrect field setting.
Can I fix the C6 error myself?
This is rated a hard fix — it often requires tools, parts, or experience, and may be safer left to a professional technician.
How much does it cost to fix the C6 error?
Fixing the C6 error on a Daikin air conditioner typically costs $100–$350, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my air conditioner with the C6 error?
We'd recommend addressing the C6 error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.