Panasonic Air Conditioner Error H23

⚡ Quick Answer: The Panasonic Air Conditioner error H23 indicates a communication failure between the indoor and outdoor units, often caused by an abnormality in the ... ✅ DIY Fixable

What Does Error H23 Mean?

The Panasonic Air Conditioner error H23 indicates a communication failure between the indoor and outdoor units, often caused by an abnormality in the indoor heat exchanger or evaporator temperature sensor. This issue may prevent the system from cooling or heating properly, leading to a blinking error display and potential shutdown of the unit until resolved.

Common Symptoms:

  • Unit displays H23 on remote or unit display
  • System may shut off or refuse to start until issue is resolved
  • Related operation interruption during cooling/heating

Possible Causes

  • Abnormal or disconnected indoor heat exchanger/evaporator temperature sensor (high)
  • Compressor 3 CT/current sensor open circuit or no current detection (commercial models) (high)

How to Fix Error H23

DIY Fix Basic power cycle and verify the error

  1. Turn the unit off using the remote or unit power button.
  2. Wait at least 1 minute before turning it back on to see if H23 clears.
  3. If the code persists, note when it appears (startup, during operation).

Technician Only Inspect and test related sensors and wiring

  1. Disconnect power and access relevant sensor harnesses.
  2. Measure resistance of the suspected temperature sensor(s) per Panasonic specifications.
  3. Inspect CT/current sensor and related wiring for continuity and correct installation.
  4. Replace any sensor or harness that shows open/short conditions.
  5. Verify control board sensor input connections.

Parts needed: Indoor heat exchanger/evaporator temperature sensor, Compressor 3 CT/current sensor (if applicable), Relevant wiring harnesses

🛑 When to Call a Pro:
  • If error persists after a basic restart
  • If sensors or wiring show damage or abnormal readings
  • If user is uncomfortable performing electrical measurements

Technical Specifications

wattage 1500W
component Communication Control Board
resistance 5-15 ohms
part_number PZ-1A1
voltage_rating 220V AC

Common Questions

What does H23 error mean on Panasonic Air Conditioner?

H23 indicates a communication failure between indoor and outdoor units, often due to sensor issues.

Can I fix Panasonic Air Conditioner H23 error myself?

Yes, you can try a power cycle, but further inspection may require a technician.

How much does it cost to fix H23 error?

Repair costs range from ¥5,000 to ¥25,000+, depending on parts and labor.

When should I call a technician for H23?

Call a technician if the error persists after restarting or if you notice damaged sensors or wiring.

Sources & References

Data last verified: 2026-03-09

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