Daikin Air Conditioner Error J6-00
⚡ Quick Answer: The Daikin Air Conditioner error code J6-00 signals a communication failure between the indoor and outdoor units, often caused by a malfunctioning hea... ✅ DIY Fixable
What Does Error J6-00 Mean?
The Daikin Air Conditioner error code J6-00 signals a communication failure between the indoor and outdoor units, often caused by a malfunctioning heat exchanger thermistor or issues with its wiring. This can prevent the unit from entering cooling or heating modes and may lead to erratic temperature readings. If the issue persists after a power reset, further inspection is necessary.
Common Symptoms:
- Air conditioner stops operation and displays the J6 code.
- Unit may not enter cooling/heating properly.
- Potential abnormal temperature reading behavior sensed by control system.
Possible Causes
- Heat exchanger thermistor failure (sensor malfunction). (high)
- Thermistor connector or wiring connection fault. (medium)
- Control board (PCB) circuit issue related to thermistor signal handling. (medium)
How to Fix Error J6-00
DIY Fix Power Reset and Basic Check
- Turn off the air conditioner and disconnect power (unplug or turn off dedicated breaker).
- Wait approximately 5–10 minutes to allow internal systems to reset.
- Restore power and attempt to restart the unit.
Technician Only Inspect and Replace Faulty Sensor or Components
- Perform diagnostic with proper HVAC tools (multimeter, service app, etc.) on the heat exchanger thermistor.
- Check thermistor wiring harness and connector for continuity and secure connection.
- Replace defective thermistor sensor if readings are out of specification.
- Inspect control board circuits related to thermistor signal for faults and repair/replace if needed.
Parts needed: Heat exchanger thermistor sensor, Thermistor wiring harness/connectors, Control board (if necessary)
- If the reset procedure does not clear the code.
- If the error reoccurs after restart.
- If internal inspections show wiring damage or suspect sensor issues.
Next step
Choose the next step for J6-00
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
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.
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.
Wiring Harness
Connects controls, sensors, motors, and other electrical components inside the appliance.
HVAC Control Board
Controls fan, compressor, sensor, and communication functions in the HVAC unit.
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.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
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.
Air Conditioner Fin Cleaner
For routine cleaning of accessible coil fins when permitted by the manufacturer. Disconnect power and follow product and appliance instructions.
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.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Technical Specifications
| wattage | N/A |
|---|---|
| component | Communication cable |
| resistance | N/A |
| part_number | DAIKIN 937000A |
| voltage_rating | 230V AC |
Common Questions
What does J6-00 error mean on Daikin Air Conditioner?
J6-00 indicates a communication failure due to thermistor malfunction, preventing proper operation.
Can I fix Daikin Air Conditioner J6-00 error myself?
Yes, you can try a power reset by disconnecting and reconnecting the power.
How much does it cost to fix J6-00 error?
Repair costs range from ¥10,000–¥50,000 for sensor replacement to ¥30,000–¥100,000 for control board repairs.
When should I call a technician for J6-00?
Call a technician if the error persists after a reset or if there are signs of wiring damage.
Sources & References
- Daikin Proshop – Error Code J6 Description (official)
- Daikin J6 Fault Heat Exchanger Thermistor Abnormality (community)
Data last verified: 2026-07-22
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