F3Serious
Hotpoint Dishwasher F3 Error Code
The thermistor that measures water temperature is faulty or disconnected, affecting heating.
Common causes
- Faulty thermistor
- Loose wiring to the thermistor
- Control board failure
How to fix it
- Check the thermistor connection at the sump area.
- Measure resistance of thermistor (should vary with temperature).
- Replace if open or shorted.
⚠ When to call a pro: If replacing the thermistor does not clear the code, the control board may need replacement.
Part links are affiliate links — as an Amazon Associate we may earn a small commission at no extra cost to you.
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.