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

Next step

Choose the next step for CJ

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Check during diagnosis

Most relevant component to inspect

Thermistor

Measures precise temperature changes and sends resistance feedback to the control board.

Typical part-only price
$15 - $35
DIY difficulty
Easy
Estimated time
15-30 mins
Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other parts options

Check related components first; use model search as a fallback.

Model number required

Model-compatible Air Conditioner parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

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Optional routine care

Maintenance supplies

These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.

Maintenance supply

Air Conditioner Fin Cleaner

For routine cleaning of accessible coil fins when permitted by the manufacturer. Disconnect power and follow product and appliance instructions.

View maintenance supply
Maintenance supply

Model-Compatible Washable AC Filter

A reusable filter option only where the appliance supports one. Match the full model, dimensions, and filter specification.

Compatibility check required: use the complete appliance model and compare the existing filter, bag, or specification before ordering.

Find one that fits my model

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.

Technical Specifications

note The previous model-independent part specification was removed. Verify the full model number and diagnosis in the manufacturer's official parts catalog before ordering.
part_number None

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: 2026-07-31

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