ErrorCodeDoctor
Daikin Air Conditioner H0 error code
The H0 error means your Daikin air conditioner detected a fault in the compressor sensor system. This can be caused by a disconnected harness or a defective PCB. Contact a qualified technician.
Common causes
- Harness is disconnected or has a defective connection
- Defective PCB
How to fix it
-
1
Contact a qualified technician to inspect the compressor sensor system wiring and PCB
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
H0 error — frequently asked questions
What does the H0 error mean on a Daikin air conditioner?
The compressor sensor system has a fault
What causes the H0 error?
The H0 error is usually caused by: Harness is disconnected or has a defective connection; Defective PCB.
Can I fix the H0 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 H0 error?
Fixing the H0 error on a Daikin air conditioner typically costs $80–$300, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my air conditioner with the H0 error?
We'd recommend addressing the H0 error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.