F12
Miele
Inlet Valve / Water Supply Fault
Machine shows F12; no water intake from plumbed-in supply
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Closed or blocked water supply valve, clogged inlet filter screen, failed solenoid inlet valve, kinked inlet hose
How to Fix / Troubleshooting
Safety first: Turn off the water supply and unplug the machine before working on the inlet system.
User-level checks:
- Verify that the household water shutoff valve is fully open.
- Inspect the inlet hose for kinks or crushing.
- Disconnect the hose from the wall and run water into a bucket to confirm supply pressure.
Technical inspection:
- Remove the inlet hose from the machine and clean the small filter screen inside the inlet valve connection.
- Access the internal solenoid inlet valve and check for scale or debris.
- Measure the coil resistance of the inlet valve and inspect wiring.
Resolution:
- Replace a defective solenoid inlet valve with the correct Miele part.
- If the valve is good but never energizes, the control board output may be faulty and should be serviced by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Water Inlet Solenoid Valve
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