E9
Hisense
EEPROM / Memory Error on Main Control Board
Dehumidifier shows E9 and will not operate; may occur 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 EEPROM data, Failed main PCB memory chip, Power surge damage, Poor PCB grounding
How to Fix / Troubleshooting
Safety first: Unplug the unit before any disassembly.
- Extended power reset: Unplug the dehumidifier for at least 30 minutes to allow capacitors to discharge and the control to fully reset. Then plug back in and test.
- Check outlet and surge protection: Verify the outlet voltage is stable and within specification. Use a surge protector to prevent future damage.
- Inspect control board: Remove the control panel cover and visually inspect the main PCB for burn marks, bulging components, or corrosion.
- Reseat connectors: Disconnect and reconnect the main harness connectors to the PCB to ensure good contact.
- Board replacement: If E9 persists, the main control board's memory is likely corrupted or damaged. Replace the main PCB with the correct Hisense part number. This repair is best done by a qualified technician.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board (PCB)
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