ErrorCodeDoctor
Daikin Air Conditioner H1 error code
The H1 error means your Daikin air conditioner detected a fault with the room temperature sensor or humidifier unit damper. This can be caused by a defective limit switch or a defective damper mechanism. Contact a qualified technician.
Common causes
- Defective limit switch
- Defective damper
How to fix it
-
1
Contact a qualified technician to inspect the room temperature sensor and humidifier unit damper
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
H1 error — frequently asked questions
What does the H1 error mean on a Daikin air conditioner?
The room temperature sensor or humidifier unit damper has a fault
What causes the H1 error?
The H1 error is usually caused by: Defective limit switch; Defective damper.
Can I fix the H1 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 H1 error?
Fixing the H1 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 H1 error?
We'd recommend addressing the H1 error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.