Daikin Air Conditioner Error H0-00

⚡ Quick Answer: The Daikin Air Conditioner error code H0-00 signifies a communication failure between the indoor and outdoor units, often resulting in the unit not co... ✅ DIY Fixable

What Does Error H0-00 Mean?

The Daikin Air Conditioner error code H0-00 signifies a communication failure between the indoor and outdoor units, often resulting in the unit not cooling. This may stem from a malfunction in the sensor system that controls the compressor or related circuit issues. Symptoms typically include the display of error H0-00, with fans potentially running while the compressor remains inactive. A reset may help temporarily, but persistent issues should be addressed by a professional.

Common Symptoms:

  • Unit stops operating or compressor does not start
  • Fans may run while compressor remains inactive
  • Error H0‑00 displayed on remote or indoor unit display

Possible Causes

  • Sensor circuit malfunction affecting compressor control (medium)

How to Fix Error H0-00

DIY Fix Basic Checks and Restart

  1. Turn off the air conditioner using the remote controller.
  2. Switch off power at the breaker for at least 5–10 minutes to allow the system to reset.
  3. Restore power and attempt to restart the unit.
  4. Observe if the error reappears.

Technician Only Inspect Sensor Circuits and Connections

  1. Use diagnostic tools to check continuity and resistance values of compressor‑related sensors (e.g., temperature sensors for suction, discharge pipe, heat exchanger).
  2. Inspect sensor harnesses and connectors for damage, corrosion, or loose contacts.
  3. Verify outdoor unit sensor board and compressor control signals.
  4. Replace any defective sensors or repair harness/connectors as needed.

Parts needed: Temperature sensors (suction, discharge pipe, heat exchanger), Sensor harness/connectors, Outdoor unit sensor/PCB interfaces

🛑 When to Call a Pro:
  • If the error reappears after a proper restart attempt
  • If you are not comfortable handling electrical diagnostics
  • If sensors or wiring show signs of damage or intermittent connection

Next step

Choose the next step for H0-00

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

Based on diagnostic data

Most relevant component to inspect

Temperature Sensor

Monitors the internal temperature to ensure correct operation and prevent overheating.

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

wattage N/A
component Control Board
resistance N/A
part_number DAIKIN 4B227A
voltage_rating 220V AC

Common Questions

What does H0-00 error mean on Daikin Air Conditioner?

H0-00 indicates a communication failure between indoor and outdoor units, often due to sensor malfunction.

Can I fix Daikin Air Conditioner H0-00 error myself?

Yes, you can try restarting the unit and checking for basic issues before calling a technician.

How much does it cost to fix H0-00 error?

Repair costs for H0-00 can range from ¥5,000 to ¥30,000+, depending on parts and region.

When should I call a technician for H0-00?

Call a technician if the error persists after a restart, or if you're uncomfortable with electrical diagnostics.

Sources & References

Data last verified: 2026-07-22

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