Daikin Air Conditioner Error CJ

⚡ Quick Answer: The Daikin Air Conditioner CJ error indicates a compressor overload due to an abnormality in the room temperature thermistor. Symptoms include the err... ✅ DIY Fixable

What Does Error CJ Mean?

The Daikin Air Conditioner CJ error indicates a compressor overload due to an abnormality in the room temperature thermistor. Symptoms include the error code CJ displayed on the unit or remote, inaccurate temperature readings, and the unit possibly continuing to operate despite the error. It is crucial to address this issue to ensure proper cooling functionality.

Common Symptoms:

  • Error code CJ displayed on unit/remote
  • Temperature readings may be inaccurate or not updating
  • Unit may continue operation despite error

Possible Causes

  • Room temperature thermistor in remote controller malfunction (medium)
  • Remote controller PCB (printed circuit board) fault (medium)
  • External interference (electrical noise) affecting sensor signal (low)

How to Fix Error CJ

DIY Fix Basic checks before professional service

  1. Ensure error CJ is correctly noted from the display or remote
  2. Power cycle the system: turn unit off via remote and breaker, wait ~30 seconds, then restart
  3. Place remote away from strong electromagnetic sources (routers, microwaves) to reduce interference potential

Technician Only Technician diagnostic and repair

  1. Inspect and test the room temperature thermistor in the remote controller for proper resistance/response
  2. Check remote controller PCB for faults or damaged circuitry
  3. If thermistor or PCB is faulty, replace the defective part and verify correct temperature readings
  4. After repair, clear error codes and test operation over several cycles to confirm resolution

Parts needed: Remote controller room temperature thermistor, Remote controller PCB

🛑 When to Call a Pro:
  • If basic resets do not clear the error
  • If error recurs frequently after reset
  • If temperature control is unreliable

Technical Specifications

wattage 1500W
component Compressor
resistance 5-10 ohms
part_number DAIKIN 4E100000
voltage_rating 230V AC

Common Questions

What does CJ error mean on Daikin Air Conditioner?

CJ error indicates a compressor overload, often linked to a faulty room temperature thermistor.

Can I fix Daikin Air Conditioner CJ error myself?

Yes, you can power cycle the unit and check for interference from electronic devices.

How much does it cost to fix CJ error?

Repair costs range from $50 to $200+, depending on parts and service.

When should I call a technician for CJ?

Call a technician if resets do not clear the error or if it frequently recurs.

Sources & References

Data last verified: 2026-07-01

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