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Error Code

Kenmore Dishwasher F12 Error Code

F12 on a Miele dishwasher is generally linked to a possible heating-related problem. This guide gives a plain-language overview, the symptoms you might notice, safe checks you can perform, and when it is best to call a technician — with a reminder that exact behavior varies by model.

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Reviewed by Daniel Reeves · Last reviewed August 11, 2026

At a glance

Error code overview

A plain-language snapshot of F12 for Kenmore Dishwasher — confirm the model series before you act.

Daniel Reeves Written by Daniel Reeves Appliance Repair Content Specialist Published August 11, 2026 Technically reviewed August 11, 2026

Content status Verified

Error code F12
Appliance Dishwasher
Quick answer

F12 — commonly associated with a heating issue on a Miele dishwasher. Meaning can vary by model; verify before relying on it.

Model compatibility

Kenmore reuses codes across series and model years, so F12 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

On many Miele dishwasher models, the F12 code is commonly associated with a possible heating-related problem. The exact meaning can differ between appliance series and model years, so treat this as general guidance and confirm it against your specific model’s documentation before acting.

Signs

Symptoms you may notice

The dishwasher shows F12 and results are cold or under-heated

The cycle runs longer than usual before F12 appears

Heating seems weak or absent when F12 is shown

Why it happens

Possible causes

A heating element or its relay

A control or sensor affecting heating

Limescale or wear reducing heat on some models

Before you call

Safe checks you can make

These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.

Confirm the appliance has power at the outlet

Allow the appliance to cool fully before any check

Perform a manufacturer-approved restart

Record the full model number before contacting a technician

Caution

Safety warning

Important safety warning

Do not open internal panels, access high-voltage wiring, or bypass any safety device. If you see smoke, sparks, a burning smell, or water near electrical parts, switch the appliance off at the outlet if it is safe to do so and call a professional.

Please avoid

What not to attempt

Do not open internal panels or access high-voltage components

Do not bypass door locks, safety switches or interlocks

Do not keep running the appliance if there is water near electrical parts, a burning smell or sparks

Get help

When to call a technician

If F12 persists after the safe checks above, or you are unsure at any point, book a diagnosis. A technician can confirm what F12 means on your specific model and resolve the underlying cause safely.

Get started

Seeing this code on your Kenmore appliance?

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Where it points

Likely related component

Often related to the heating element or relay (varies by model).

Fix it right

Recommended repair service

Dishwasher Repair

Dishwasher not draining, not cleaning, or showing an error code? We find the cause and get your Kenmore dishwasher back to spotless cycles.

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FAQ

Frequently asked questions

References

Sources & references

Supporting manuals and references used for this error-code guide.

Miele appliance user manual — error/display messages section

Reference note

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