Electrolux Dishwasher Error Code i40 — Overfill Detected
What this means
The i40 error code on Electrolux dishwashers indicates the overfill protection system has been triggered. The water level inside the wash tub has exceeded the maximum safe level. This can be caused by a water inlet valve that is stuck open, a faulty water level sensor (pressure switch), a clogged pressure switch tube, or excess suds from using the wrong detergent. The dishwasher will attempt to drain the excess water.
Alternate codes: I40, i 40
Step-by-step fix
4 stepsCancel and drain
Press Cancel to stop the cycle. The dishwasher should automatically begin draining. If it doesn't, turn off the water supply under the sink to stop any further filling. Open the door carefully — there may be a lot of water.
Have towels ready to catch any overflow when opening the door.
Check detergent type
Ensure you are using dishwasher-specific detergent, not regular dish soap. Regular dish soap creates massive suds that can trigger the overfill float and interfere with the water level sensor.
If too much suds are present, run a rinse cycle to clear them out before troubleshooting further.
Test the water inlet valve
Turn off the water supply under the sink. If water stops entering the dishwasher, the valve may be stuck open. Test the valve solenoid for proper operation — it should close when de-energized.
If the dishwasher continues to fill even after turning off the water supply at the valve under the sink, the supply valve itself may not be fully closing.
Check the float switch and pressure system
Inside the dishwasher tub, check the overfill float (a small dome near the front corner). Make sure it moves up and down freely. Also check the pressure switch tube for clogs.
Food debris can accumulate around the float and prevent it from rising with the water level.
When to call a professional
If the inlet valve, float switch, and detergent are all fine, the control board may have an issue with the fill control circuit. Call a professional.
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.
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