F04Warning
Speed Queen Dishwasher F04 Error Code
The thermistor or temperature sensor is reading out of range.
Common causes
- Loose wiring to sensor
- Faulty thermistor
- Control board issue
How to fix it
- Unplug dishwasher for 1 minute to reset control.
- Check wire harness connection at sensor (behind lower kickplate).
- Measure sensor resistance with multimeter (should be ~10k ohms at room temp).
⚠ When to call a pro: If error persists or resistance is incorrect, call a 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.