Miele Dishwasher Error Code F12
Water intake fault at the start of a step
The dishwasher failed to take in the required water at the start of a program step, so it stops with F12. It is closely related to F13 (which faults later in the step) and almost always traces to the supply side — a closed or restricted tap, a kinked hose, or a blocked inlet screen.
What Does Error Code F12 Mean on a Miele Dishwasher?
Water intake fault at the start of a step.
The dishwasher failed to take in the required water at the start of a program step, so it stops with F12. It is closely related to F13 (which faults later in the step) and almost always traces to the supply side — a closed or restricted tap, a kinked hose, or a blocked inlet screen.
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 Supply valve closed or partially open 40% of cases
- 2 Inlet hose kinked 30% of cases
- 3 Inlet screen blocked 20% of cases
- 4 Water inlet valve failure 10% of cases
How to Fix Miele Dishwasher Error Code F12
- 1
Open the supply tap
Confirm the under-sink valve is fully open and water pressure is adequate.
- 2
Straighten the inlet hose
Trace the hose from wall to unit for kinks.
- 3
Clean the inlet screen
Unscrew the supply hose and clean the mesh screen at the inlet port.
- 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.
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Thanks for letting us know. If the steps above didn't work, see when to call a professional.
When to Call a Professional
If the supply is confirmed good, Miele authorized service recommended for valve replacement.
Related Error Codes
Same Code on Other Brands
Error code F12 appears on these other brands too. See every brand that shows F12 →
Find Replacement Parts
Use these links to find the exact replacement parts for your Miele Dishwasher:
External links — ApplianceErrors.com is not affiliated with these retailers.
More Miele Dishwasher Error Codes
Frequently Asked Questions
What does error code F12 mean on a Miele Dishwasher? +
How do I fix error code F12 on my Miele Dishwasher? +
How do I clear or reset error code F12? +
Is error code F12 serious? +
Sources & References
- • Miele Customer Support — official manufacturer documentation
- • Our editorial & verification policy
Content verified against manufacturer service documentation. Last verified: June 14, 2026.