F12Serious
Whirlpool Dishwasher F12 Error Code
Internal control board relay or circuit failure detected, often due to short or component failure.
Common causes
- Failed relay on control board
- Power surge damage
- Loose connector to main board
How to fix it
- Unplug dishwasher for 30 minutes to reset.
- Check all harness connectors to control board for tightness.
- Inspect board for burned components (visual).
⚠ When to call a pro: If reset doesn't clear, control board likely faulty; call 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.