F12Warning
GE Dishwasher F12 Error Code
The thermistor that measures water temperature is reading incorrectly.
Common causes
- Faulty thermistor
- Loose or corroded connection
- Control board issue
How to fix it
- Check thermistor wiring and connections
- Test thermistor resistance with a multimeter
⚠ When to call a pro: If thermistor fails resistance test, replace it; otherwise, control board may be bad.
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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.