CodeRegistry
Brands
  1. Home
  2. Panasonic
  3. Aquarea Heat Pumps
  4. H23
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

H23

H23 - Indoor refrigerant liquid temperature sensor abnormality

Panasonic · Aquarea Heat Pumps

What does H23 mean?

The sensor measuring the refrigerant liquid temperature indoors is faulty or disconnected. The system will stop operation after 5 seconds.

Common Causes

  • Refrigerant liquid temperature sensor is defective
  • Refrigerant liquid temperature sensor is disconnected

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check that the indoor refrigerant liquid temperature sensor is securely connected.

  2. 2

    Inspect the sensor for any damage.

  3. 3

    Replace the sensor if it is defective.

  4. 4

    Contact a qualified installer or service technician for further assistance.

Browse all codes in this manual (69)
Verified technical data. Last updated: April 2026

Related Faults

2 beeps then pause2 beeps then pause - Overfill warning3 red flashes3 red flashes - Communication errorError Code DisplayError Code Display - Abnormality detected
Source: Panasonic Aquarea Heat Pumps
Open Manual (Page 76)Search more codes in this manual