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Miele Dishwasher Error Code F12

Reviewed by the ApplianceErrors Editorial Team · Verified against manufacturer service documentation · Last verified: July 19, 2026
⚠ Medium Severity 🔧 Easy DIY

Water intake fault at the start of a step

The most common cause of the F12 error on a Miele dishwasher is supply valve closed or partially open (~40% of cases); start with: open the supply tap.

💰 DIY cost: $0–$100 👨‍🔧 Pro cost: $180–$380 Save $180+ by doing it yourself
Miele Dishwasher error code F12 on the display panel
How the F12 code appears on a Miele dishwasher display

What Does Error Code F12 Mean on a Miele Dishwasher?

Water intake fault at the start of a step.

F12 fires when the control board detects that the dishwasher did not draw in the required water at the moment a program step begins, judged by flow-meter counts and fill timing against expected volume. Because the fault triggers right at step start rather than mid-fill, it points to the supply side — a closed tap, kinked hose, or clogged inlet screen — before the inlet valve. This start-of-step timing distinguishes it from F13, which faults later during the same fill.

Models affected: Miele dishwashers across recent generations, including the G 7000 Series and comparable freestanding and integrated models
What owners report: Owners commonly report F12 appearing after the tap was left partly closed following plumbing work or after a hose shifted and kinked behind the unit. Many say simply opening the valve fully, straightening the hose, and cleaning the inlet mesh clears it; if the code persists with good supply, the inlet valve is usually the next suspect.

What Causes Error Code F12?

Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:

  1. 1
    Supply valve closed or partially open 40% of cases
  2. 2
    Inlet hose kinked 30% of cases
  3. 3
    Inlet screen blocked 20% of cases
  4. 4
    Water inlet valve failure 10% of cases

How to Fix Miele Dishwasher Error Code F12

🔧 Easy DIY Est. time: 10–20 min
⚡ Safety first: Unplug the appliance before opening any panels or touching internal components.
  1. 1

    Open the supply tap

    Confirm the under-sink valve is fully open and water pressure is adequate.

  2. 2

    Straighten the inlet hose

    Trace the hose from wall to unit for kinks.

  3. 3

    Clean the inlet screen

    Unscrew the supply hose and clean the mesh screen at the inlet port.

  4. 4

    Replace the inlet valve

    If supply is good but F12 stays, the valve has likely failed.

    🔩 Miele inlet valve ($50–$100)

How to Reset Error Code F12

Open the tap fully and straighten the hose, then switch off ~60 seconds, switch back on, and restart on a short program.

Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.

Did this guide fix your appliance?

When to Call a Professional

If the supply is confirmed good, Miele authorized service recommended for valve replacement.

Average professional repair cost for this issue: $180–$380

Related Error Codes

F13
Water intake fault — dishwasher not filling
⚠ Medium Severity

Same Code on Other Brands

Error code F12 appears on these other brands too. See every brand that shows F12 →

Frigidaire logo
Frigidaire Oven F12
Electronic control identification / ROM fault

Find Replacement Parts

Use these links to find the exact replacement parts for your Miele Dishwasher:

🔩
Search PartSelect
Miele Dishwasher repair parts
🔧
Search RepairClinic
Step-by-step video guides

External links — ApplianceErrors.com is not affiliated with these retailers.

More Miele Dishwasher Error Codes

F11 Drainage fault — water not pumped out F15 Heating issue — water not heating to target temperature F70 Flow meter fault — water quantity sensor failure F14 Heater pressure switch fault F24 Heating circuit fault — heater relay or temperature sensor F78 Circulation pump / frequency converter fault

Frequently Asked Questions

Can I keep using my Miele Dishwasher when error F12 appears? +
You often can for a cycle or two, but the water-supply issue behind F12 will keep interrupting normal operation until it is fixed. Plan the repair rather than ignoring the code.
What most commonly causes F12 on a Miele Dishwasher? +
Across reported Miele dishwasher repairs, the most frequent is supply valve closed or partially open (40% of cases), inlet hose kinked (30%), then inlet screen blocked (20%). Check them in that order before replacing any parts.
F12 keeps coming back after a reset — what should I check next? +
A reset only clears the stored F12 fault; if it returns, the water-supply problem is still present. Move on to the physical checks — open the supply tap, then straighten the inlet hose — since the code will reappear until the root cause is resolved. This is a beginner-friendly job needing only basic hand tools.
How much does it cost to fix Miele Dishwasher error F12? +
A DIY repair typically runs $0–$100 in parts, versus $180–$380 for a professional service call, so handling it yourself saves around $180. Expect the work to take about 10–20 minutes.
Which Miele Dishwasher models show error F12? +
F12 is documented on Miele dishwashers across recent generations, including the G 7000 Series and comparable freestanding and integrated models. Other units sharing the same control platform can display it too, so the fixes here generally transfer across the series.

Sources & References

Content verified against manufacturer service documentation. Last verified: July 19, 2026.

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