F12
Miele
Cold Water Inlet Valve Fault
Washer does not take in cold water, F12 displayed
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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
Defective cold water inlet valve coil, Loose wiring to cold valve, Blocked cold inlet filter, Low mains water pressure
How to Fix / Troubleshooting
Safety first: Disconnect power and close the water tap.
- Check cold water supply: Ensure the cold tap feeding the washer has good pressure. Clean the filter screen in the cold inlet hose and valve port.
- Inspect hose and valve: Confirm the cold hose is connected to the correct tap and not kinked. Remove the top cover (Torx screws at rear) to access the inlet valve block.
- Check wiring: With power still off, verify that the cold valve connector is fully seated and not burnt.
- Test operation: Reassemble, restore power, and start a cycle. If F12 reappears, the cold valve coil is likely faulty and the valve block should be replaced.
Work on live components should only be done by qualified persons. If unsure, call a Miele technician.
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Repair Difficulty
Medium
3/5
Required Part
Cold Water Inlet Valve
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