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Error Code

Miele Washer F103 Code M-Bus Module Fault

Plain-language guidance for Miele code F103 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 F103
Appliance Washer
Quick answer

F103 means an M-Bus module fault on a Miele washing machine or washer-dryer. Booking a repair is the manual's advice.

Model compatibility

Miele reuses codes across series and model years, so F103 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

Fault with the M-Bus module; technical fault.

F103 facts

  • Shown on: Miele washing machine or washer-dryer display
  • Meaning: a fault with the M-Bus module
  • Owner can fix it: no
  • Do next: book a repair appointment

Other codes to compare

If your display reads something else, see F1 (temperature sensor circuit short) or F104 (drum drive fault).

At a glance

Code F103
What it means Fault with the M-Bus module; technical fault.
What you can check F103 cannot be cleared at home. Note the code, then book a repair appointment rather than trying to reset it.
When to call a technician The module fault is technical, so a technician needs to look at the machine.

Washer service in the metro areas we cover

Call (844) 459-5005 for the Miami, New York, Houston, Los Angeles and San Diego metro areas. Keep the code and model number handy.

Source: Miele support: Washing machine Fault F103

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
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