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Error Code

Miele Washer F4 Code Heater Sensor Open-Circuited

Plain-language guidance for Miele code F4 Heater bank temperature sensor open-circuited on Washer — symptoms, safe checks, and when to call a technician.

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At a glance

Overview

Miele Repair Editorial Team Written by Miele Repair Editorial Team Editorial Team Published October 20, 2026 Updated October 28, 2026
Error code F4 Heater bank temperature sensor open-circuited
Appliance Washer
Quick answer

F4 on a Miele washer or washer-dryer means the heater bank temperature sensor is open-circuited. It is a technical fault the owner cannot remedy.

Model compatibility

Miele reuses codes across series and model years, so F4 Heater bank temperature sensor open-circuited may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.

Plain language

What this code means

Heater bank temperature sensor open-circuited.

F4 at a glance

  • Display: F4
  • Meaning: heater bank temperature sensor open-circuited
  • Fits: washing machines and washer-dryers
  • Owner fix: none, book service

Next step

The support entry calls this a technical fault. Arrange a repair appointment rather than trying anything at home.

At a glance

Code F4 Heater bank temperature sensor open-circuited
What it means Heater bank temperature sensor open-circuited.
What you can check Do not attempt anything at home for this code. Write down F4 and keep the machine off.
When to call a technician An open-circuited heater bank sensor is a technical fault, so arrange a service visit rather than trying a repair.

Compare with:

  • F43 (electronic module fault, with an Extras note)
  • F41 (electronic module fault)

Miele washer repair in your area

Service for Miele washers covers the Miami, New York, Houston, Los Angeles and San Diego metro areas. Dial (844) 459-5005 and give the code (F4), the model number and what was tried.

Source: Miele support: Washing machine Fault F4

Caution

Safety warning

Important safety warning

Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.

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(844) 459-5005
Phone (844) 459-5005
Email info@mieleservicecenter.support
Hours Mon–Sat: 8:00 AM – 7:00 PM
Service area Serving Miami, New York, Houston, Los Angeles and San Diego metro areas.
Response time Same-day and next-day appointments in most areas.