Electrolux Washer Error Code E31 — Pressure Sensor Frequency Out of Range
What this means
The E31 error code on Electrolux washers indicates the pressure sensor (analog pressure transducer) is outputting a frequency that the control board cannot interpret. Unlike a simple pressure switch, Electrolux models use a sensor that converts water pressure into a frequency signal. A faulty sensor, a clogged air trap or pressure hose, or a damaged wire harness can produce this error.
Alternate codes: E 31
Step-by-step fix
4 stepsReset the washer
Unplug the washer for 5 minutes and plug it back in. Run a cycle. If the error does not return, it was a momentary electrical glitch in the sensor circuit.
If the code reappears within the first minute of filling, the sensor or its connections are likely at fault.
Inspect the pressure hose and air trap
Unplug the washer and remove the top panel. Locate the pressure sensor and trace the hose from the sensor to the air trap on the outer tub. Check for kinks, cracks, or disconnections. Remove the air trap and rinse it clean of detergent residue.
The air trap is a small chamber where the hose connects to the tub. Residue buildup here is a common cause of pressure sensor errors.
Test the pressure sensor
Disconnect the pressure sensor connector. With the washer plugged in and in diagnostic mode, the control board should output a reference voltage to the sensor. Use a multimeter to verify the voltage is present at the connector (typically 5V DC). If no voltage, the board may be faulty. If voltage is present but the sensor does not respond, the sensor is bad.
Consult your model's service manual for exact diagnostic mode entry and expected voltage values.
Replace the pressure sensor
If the sensor is confirmed faulty, replace it. Remove the mounting clip, disconnect the hose and electrical connector, and install the new sensor. Run a test cycle to verify proper water level detection.
Make sure the replacement sensor is the correct part number for your specific Electrolux model — different models use different sensor types.
When to call a professional
If the sensor and hose check out but the error persists, the control board's sensor input circuit may need diagnosis. A qualified technician with Electrolux diagnostic tools can pinpoint the issue.
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
Analog Pressure Sensor
Part #137015300 · $20–$45
If the sensor does not respond to the control board's reference voltage
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