ErrorCodeDoctor
Daikin Air Conditioner CJ error code
The CJ error means your Daikin air conditioner detected a fault with the room temperature thermistor inside the remote controller. This sensor reads the room temperature at the remote controller location. Contact a qualified technician or dealer to replace the remote controller.
Common causes
- Room temperature thermistor inside the remote controller is defective
- Remote controller PCB has malfunctioned
- External electrical noise affecting the remote controller
How to fix it
-
1
Contact a qualified technician or dealer — the remote controller may need to be replaced
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
CJ error — frequently asked questions
What does the CJ error mean on a Daikin air conditioner?
The room temperature thermistor in the remote controller has a fault
What causes the CJ error?
The CJ error is usually caused by: Room temperature thermistor inside the remote controller is defective; Remote controller PCB has malfunctioned; External electrical noise affecting the remote controller.
Can I fix the CJ error myself?
It's possible for a moderately handy person, but budget Requires professional service and expect some disassembly.
How much does it cost to fix the CJ error?
Fixing the CJ error on a Daikin air conditioner typically costs $80–$200, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my air conditioner with the CJ error?
In most cases yes, but it's best to address the CJ error soon — see the fix steps below to resolve it.