E9
Electrolux
EEPROM / Memory Error on Main Control Board
Dehumidifier displays E9 and will not operate; may appear after a power surge or lightning storm.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Corrupted firmware or EEPROM data, Power surge damage to main PCB, Failed main control microcontroller, Poor grounding or line noise
How to Fix / Troubleshooting
Safety first: Unplug the unit before opening any panels.
Steps to address E9:
- Hard reset: Unplug the dehumidifier for at least 15 minutes to allow capacitors to discharge. Plug back in and check if E9 clears.
- Check power source: Plug the unit directly into a properly grounded wall outlet (avoid extension cords or power strips). Verify correct voltage with a multimeter if possible.
- Inspect control board: Remove the control panel cover and visually inspect the main PCB for burn marks, swollen components, or corrosion.
- Reseat connectors: Disconnect and reconnect all harnesses to the main board to ensure good contact.
- Replace main control board: If E9 persists, the EEPROM or microcontroller is likely damaged. Replace the main control board with the correct Electrolux part number.
- Use surge protection: After replacement, consider using a quality surge protector to reduce future risk.
Warning: Do not attempt to reprogram or reflash the control board firmware unless you have the official Electrolux tools and files.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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