ErrorCodeDoctor
Panasonic · Washing Machine

Panasonic Washing Machine H23 error code

Difficulty: Hard · Cost: $100–$350 · Duration: Requires professional service

The H23 error means your Panasonic washing machine detected a problem with the heater relay on the main PCB. This relay controls power to the heating element during hot wash cycles. When it develops a fault the machine cannot heat the water safely and stops the cycle. Checking the heating element and wiring before replacing the board is recommended as a faulty element can sometimes trigger this error.

Common causes

  • Heater relay on the main control PCB has malfunctioned
  • Heating element is faulty causing the relay to detect an abnormal condition
  • Wiring to the heating element is loose or damaged
  • Main control board has failed

How to fix it

  1. 1

    Unplug the machine and do not attempt to use it

  2. 2

    Contact a qualified technician to inspect the heating element, wiring harness, and heater relay

  3. 3

    The main PCB may need replacing if the relay itself has failed

Related Panasonic Washing Machine error codes

1

U11

The washing machine cannot drain the water from the drum

easy
2

U12

The lid or door is open or not being detected as closed

easy
3

U13

The load is unbalanced and the machine cannot complete the spin cycle

easy
4

U14

The washing machine cannot fill with water within the expected time

easy

H23 error — frequently asked questions

What does the H23 error mean on a Panasonic washing machine?

The heater relay on the main control board detected an abnormal condition

What causes the H23 error?

The H23 error is usually caused by: Heater relay on the main control PCB has malfunctioned; Heating element is faulty causing the relay to detect an abnormal condition; Wiring to the heating element is loose or damaged; Main control board has failed.

Can I fix the H23 error myself?

This is rated a hard fix — it often requires tools, parts, or experience, and may be safer left to a professional technician.

How much does it cost to fix the H23 error?

Fixing the H23 error on a Panasonic washing machine typically costs $100–$350, depending on parts and whether you do it yourself or hire a technician.

Is it safe to keep using my washing machine with the H23 error?

We'd recommend addressing the H23 error before continuing to use the washing machine, since hard-rated issues often involve a real fault rather than a minor glitch.