Whirlpool Dishwasher Error Code F3 E1 — Thermistor/Sensor Error
What this means
The F3 E1 error code on Whirlpool dishwashers indicates the thermistor (temperature sensor) inside the dishwasher is reading a value that is outside its normal operating range. This sensor monitors water temperature during the wash and rinse cycles to ensure proper cleaning and sanitizing temperatures. A faulty sensor can cause the dishwasher to use water that is too hot or not hot enough, leading to poor cleaning or possible damage.
Alternate codes: F3E1
Step-by-step fix
4 stepsReset the dishwasher
Turn off the dishwasher circuit breaker for 5 minutes to allow a full reset. Turn it back on and start a cycle. Sensor errors can occasionally be caused by a temporary glitch.
If the error clears after a reset but returns during the next cycle, the sensor is likely failing intermittently.
Locate the thermistor
The thermistor is typically located in the sump area at the bottom of the dishwasher tub or near the heating element. Remove the lower dish rack and spray arm to access it. It is a small cylindrical component with a two-wire connector.
Refer to your model's tech sheet (usually attached to the inside of the door panel or side panel) for the exact thermistor location.
Test the thermistor
Disconnect the thermistor's wire connector. Use a multimeter set to ohms to measure resistance. At room temperature (77°F), the thermistor should read approximately 50,000 ohms (50K). If it reads 0 or infinite, it has failed.
You can also test by placing the sensor in warm water — the resistance should decrease as temperature increases.
Replace the thermistor
If the thermistor tests out of range, remove it from its mounting location and disconnect the wires. Install the replacement sensor, reconnect the wiring, and run a test cycle.
Make sure the replacement sensor is firmly seated in its housing — a loose sensor will give inaccurate readings.
When to call a professional
If replacing the thermistor does not resolve the error, the control board may have a fault in its temperature sensing circuit, which requires professional electronic diagnosis.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Links may earn us a commission at no extra cost to you. We only recommend parts relevant to this repair.