Written by
Miles Hartwell Editorial authorPublished September 11, 2026
Content status:
Verified
Error codeEr09
ApplianceDishwasher
Affected model seriesEIDW6105 / EIDW5905
Quick answer
Er09 — Electrolux dishwasher code Er09 indicates communication failure between the user board and power supply.
Model compatibility: Electrolux reuses codes across series and model years, so Er09 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
Electrolux dishwasher code Er09 points to communication failure between the user board and power supply. The display narrows the diagnostic path, but it does not prove which component should be replaced. Use the observed symptoms and the full model number to confirm the correct diagnostic path.
Signs
Symptoms you may notice
controls may become unresponsive
cycle may stop unexpectedly
code may return after power-up
Why it happens
Possible causes
control-board communication issue
wiring or connector problem
configuration or state-machine error
power-supply issue
Before you call
Safe checks you can make
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
Turn the dishwasher off at the breaker for several minutes.
Restore power and try one normal cycle.
Do not remove the console or control-board covers.
If the code returns, stop repeated reset attempts.
Important safety warning. Stop user-level troubleshooting after one safe reset if the code returns.
Get help
When to call a technician
A recurring Er09 control code needs model-specific board, wiring, and communication checks.
Seeing this code on your Electrolux appliance?
Book a specialist visit for a clear estimate and approval before any repair.
Electrolux dishwasher repair in Los Angeles for drain, fill, circulation, drying, leak, latch, and electronic-control problems. Confirm coverage by ZIP.
It indicates communication failure between the user board and power supply. Confirm the full model number because Electrolux diagnostic meanings can vary between control platforms.
You can try the safe external checks on this page and one power reset when appropriate. If the code returns, repeated resets are not a substitute for diagnosis.
If the code clears after one reset and operation is normal, one test cycle is reasonable. If it returns, arrange diagnosis.
References
Sources & references
Electrolux EIDW6105/EIDW5905 service data sheet 154676604.
Ready to get your Electrolux appliance working again?
Book a repair online or call us — clear estimates and approval before any repair work begins.
