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

Unplug the machine and do not attempt to use it
2

Contact a qualified technician to inspect the heating element, wiring harness, and heater relay
3

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