ErrorCodeDoctor
Daikin Air Conditioner UH error code
The UH error means your Daikin air conditioner detected a system malfunction. This can be caused by improper transmission wiring between indoor and outdoor units, a defective indoor unit PCB, or a defective outdoor unit PCB. Contact a qualified technician to inspect the system wiring and PCBs.
Common causes
- Improper connection of transmission wiring between indoor and outdoor units
- Defective indoor unit PCB
- Defective outdoor unit PCB
How to fix it
-
1
Contact a qualified technician to inspect the system wiring and PCBs
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
UH error — frequently asked questions
What does the UH error mean on a Daikin air conditioner?
A system malfunction was detected
What causes the UH error?
The UH error is usually caused by: Improper connection of transmission wiring between indoor and outdoor units; Defective indoor unit PCB; Defective outdoor unit PCB.
Can I fix the UH 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 UH error?
Fixing the UH error on a Daikin air conditioner typically costs $80–$400, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my air conditioner with the UH error?
We'd recommend addressing the UH error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.