F3Warning
KitchenAid Dishwasher F3 Error Code
The temperature sensor is reading out of range or has failed.
Common causes
- Failed thermistor
- Loose connection to thermistor
- Control board issue
How to fix it
- Measure thermistor resistance (should be ~50k ohms at 77°F)
- Check wiring harness from thermistor to control board
⚠ When to call a pro: If thermistor tests bad, replace it; if good, the control board may be faulty.
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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.