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Error Code

Miele Dishwasher F42 Error Code

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

Maya Chen Written by Maya Chen Appliance Repair Content Specialist Published October 20, 2026

Content status Verified

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 on a Miele dishwasher is a mains frequency registration fault. Miele classes it as a technical fault the owner cannot remedy.

Suggested step

Book a repair appointment.

Similar-looking messages: F40 and F47, both electronic module faults.

Miele dishwasher repair in Los Angeles

Los Angeles owners can book Miele dishwasher repair on (310) 742-0025. Keep the displayed code, the model number and a note of what you have done so far within reach. Details on dishwasher repair are on the service page.

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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Request a repair visit for a Miele appliance in Los Angeles County or Orange County. Share the model and symptom — or call and we will take the details.

(310) 742-0025
Phone (310) 742-0025
Email info@mielelosangeles.support
Hours Mon–Sat: 8:00 AM – 7:00 PM
Service area Serving Los Angeles County and Orange County.