Electrolux Dishwasher Error Code Er 01 — Stuck Relay on Control Board
What this means
The Er 01 error code on Electrolux dishwashers indicates a safety check has detected a relay on the main control board that remains energized when it should be off. This means a component (wash motor, drain pump, or heater) may be running uncontrolled. The dishwasher will shut down as a safety measure. This is a control board hardware failure that typically cannot be resolved by resetting.
Alternate codes: ER01, ER-01, Er01
Step-by-step fix
4 stepsDisconnect power immediately
Turn off the circuit breaker for the dishwasher. A stuck relay means a component could be running uncontrolled, which is a safety hazard. Do not try to run the dishwasher.
If you hear the dishwasher running when it shouldn't be (motor humming, heater heating with no cycle selected), turn off the breaker right away.
Wait and attempt a reset
Leave the breaker off for 15 minutes, then turn it back on. In rare cases, the relay may have been temporarily stuck due to a voltage spike. If the error returns immediately, the board needs replacement.
While waiting, note which component seemed to be running uncontrolled — this helps the technician.
Check connected components
Before replacing the board, check if a shorted component caused the relay to weld shut. Test the wash motor, drain pump, and heating element for shorts to ground. A shorted component can blow the relay on a new board.
Test each component's wiring for continuity to ground — any reading other than OL indicates a short.
Replace the control board
If components are fine, replace the main control board. Transfer all wire connections carefully using photos taken before disassembly.
Confirm the replacement board part number matches your specific model — board configurations can vary.
When to call a professional
This is a safety-critical error code. Unless you are confident in appliance electrical diagnosis, call a professional to handle this repair.
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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