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Error Code

Miele Dishwasher F42 Code Mains Frequency Registration Fault

Plain-language guidance for Miele code F42 on Dishwasher — 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 F42
Appliance Dishwasher
Quick answer

F42 on a Miele dishwasher is a mains frequency registration fault, a technical fault.

Model compatibility

Miele reuses codes across series and model years, so F42 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

Mains frequency registration fault.

F42 summary

  • Reads: F42
  • Means: mains frequency registration fault
  • Owner repair: not possible; book a repair appointment

More codes

  • F594: electronic module fault
  • F52: foam detected

Miele dishwasher service in the metro areas

Owners in the Miami, New York, Houston, Los Angeles and San Diego metro areas can reach us at (844) 459-5005. Before calling, note the fault code, the model number and what you have tried. Browse Miele dishwasher repair for more.

At a glance

Code F42
What it means Mains frequency registration fault.
What you can check No owner repair is possible for F42, and no home check is named. Note the code and keep the dishwasher unused.
When to call a technician A mains frequency registration fault needs a technician, so arrange a repair appointment.

Source: Miele support, Dishwasher Fault F42

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.