F12Serious
Miele Washer F12 Error Code
The drain pump motor is not functioning or has an electrical fault.
Common causes
- Faulty drain pump motor
- Wiring issue between control board and pump
- Blocked pump impeller
How to fix it
- Check drain pump filter for debris
- Listen for humming sound from pump during drain cycle
- If no sound, check continuity of pump motor wires
⚠ When to call a pro: If no humming sound and continuity is broken, replace pump or call a technician.
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Always unplug the appliance (and turn off the water for washers/dishwashers) before inspecting. These guides are for information only and are not a substitute for a professional repair.