F25Serious
Miele Washer F25 Error Code
A secondary heater relay or contactor has failed, often related to the heater circuit safety.
Common causes
- Defective relay on control board
- Heater short circuit
- Overheating
How to fix it
- Similar to F14
- Check heater and NTC first
- Inspect control board for damage
⚠ When to call a pro: If heater and NTC are fine, control board replacement.
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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.