Daikin Air Conditioner Error HC

⚡ Quick Answer: The Daikin Air Conditioner HC error code indicates a compressor overheating issue, usually linked to a failed thermistor or temperature sensor in the ... ✅ DIY Fixable

What Does Error HC Mean?

The Daikin Air Conditioner HC error code indicates a compressor overheating issue, usually linked to a failed thermistor or temperature sensor in the outdoor unit. Symptoms include the unit displaying the HC code, stopping operation, and abnormal temperature readings. Unusual noises may also occur, suggesting a fault that needs addressing to restore functionality.

Common Symptoms:

  • Unit displays HC code and stops operating
  • Outdoor unit fault indication
  • Sensor‑related abnormal temperature reading

Possible Causes

  • Thermistor / temperature sensor failure (e.g., water temperature or outdoor temperature thermistor) (medium)

How to Fix Error HC

DIY Fix Power cycle and check external conditions

  1. Turn off the air conditioner using the remote/controller.
  2. Shut off power at breaker or disconnect power for ~1 minute.
  3. Ensure outdoor unit vents are clear of debris and airflow is unobstructed.
  4. Restore power and restart the unit.

Technician Only Inspect and replace faulty thermistor/temperature sensor

  1. Access outdoor unit control panel and locate the temperature sensing thermistor(s).
  2. Measure resistance/operation of the outdoor ambient/water temperature thermistor.
  3. Replace defective thermistor or associated sensor harness as needed.
  4. Verify system operation post‑repair.

Parts needed: Outdoor unit thermistor(s), Associated wiring harness

🛑 When to Call a Pro:
  • If the HC error persists after power cycling
  • If there are signs of electrical damage or loose connections
  • If overheating or other abnormal behaviors are observed

Technical Specifications

wattage 1500W
component Compressor
resistance 5-10 ohms
part_number Daikin 4E048003
voltage_rating 230V AC

Common Questions

What does HC error mean on Daikin Air Conditioner?

HC error on Daikin AC indicates a compressor overheating due to a thermistor failure.

Can I fix Daikin Air Conditioner HC error myself?

Yes, power cycle the unit and check that outdoor vents are clear.

How much does it cost to fix HC error?

The estimated repair cost ranges from ¥5,000 to ¥30,000, including parts and labor.

When should I call a technician for HC?

Call a technician if the HC error persists after power cycling or if you notice electrical damage.

Sources & References

Data last verified: 2026-07-07

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