ErrorCodeDoctor
Daikin Air Conditioner H5 error code
The H5 error means your Daikin air conditioner detected a fault with the compressor motor overload thermistor — the sensor that monitors compressor temperature to prevent overheating. Contact a qualified technician to inspect and replace the thermistor.
Common causes
- Defective compressor motor overload thermistor
- Defective connector contact
How to fix it
-
1
Contact a qualified technician to inspect and replace the compressor motor overload thermistor
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
H5 error — frequently asked questions
What does the H5 error mean on a Daikin air conditioner?
The compressor motor overload thermistor has a fault
What causes the H5 error?
The H5 error is usually caused by: Defective compressor motor overload thermistor; Defective connector contact.
Can I fix the H5 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 H5 error?
Fixing the H5 error on a Daikin air conditioner typically costs $80–$250, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my air conditioner with the H5 error?
We'd recommend addressing the H5 error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.