ErrorCodeDoctor
Daikin Air Conditioner E0 error code
The E0 error means a protection device connected to the outdoor unit PCB has been activated. This can be caused by a defective protection device connector contact or the protection device itself being triggered by an actual fault condition. Contact a qualified technician to inspect the outdoor unit protection devices.
Common causes
- Protection device connected to the outdoor unit PCB was activated
- Defective protection device connector contact
How to fix it
-
1
Contact a qualified technician to identify which protection device was activated and inspect the outdoor unit
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
E0 error — frequently asked questions
What does the E0 error mean on a Daikin air conditioner?
An outdoor unit protection device was activated
What causes the E0 error?
The E0 error is usually caused by: Protection device connected to the outdoor unit PCB was activated; Defective protection device connector contact.
Can I fix the E0 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 E0 error?
Fixing the E0 error on a Daikin air conditioner typically costs $80–$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 E0 error?
We'd recommend addressing the E0 error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.