ErrorCodeDoctor
Daikin Air Conditioner J1 error code
The J1 error means your Daikin air conditioner detected a fault with the outdoor unit pressure sensor. This can be caused by a defective sensor connector, a defective pressure sensor, or a defective outdoor unit PCB. Contact a qualified technician.
Common causes
- Defective pressure sensor connector contact
- Defective pressure sensor
- Defective outdoor unit PCB
How to fix it
-
1
Contact a qualified technician to inspect and replace the pressure sensor
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
J1 error — frequently asked questions
What does the J1 error mean on a Daikin air conditioner?
The outdoor unit pressure sensor has a fault
What causes the J1 error?
The J1 error is usually caused by: Defective pressure sensor connector contact; Defective pressure sensor; Defective outdoor unit PCB.
Can I fix the J1 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 J1 error?
Fixing the J1 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 J1 error?
We'd recommend addressing the J1 error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.