E9
Dimplex
EEPROM / Memory Error on Main PCB
Dehumidifier shows E9 and will not start; may occur after a power surge
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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 control board firmware, Failed EEPROM IC, Power surge damage to main PCB
How to Fix / Troubleshooting
Safety: Unplug the unit. Electronic board work should be done by experienced persons only.
Steps:
- Perform a power reset: unplug the dehumidifier for at least 10 minutes, then plug back in and try again. Sometimes this clears transient memory errors.
- If E9 returns immediately, inspect the main control PCB for burn marks, bulging capacitors, or signs of surge damage.
- There is typically no user-serviceable way to reprogram the EEPROM in Dimplex consumer units. The standard repair is to replace the main control PCB with an OEM part.
- Transfer any wiring harnesses one by one from the old board to the new board, matching connectors carefully. Take photos before removal to avoid miswiring.
- Secure the new PCB, reassemble the cabinet, and test operation. Confirm that E9 is cleared and all functions work.
Note: Use a surge protector to reduce the risk of future EEPROM or PCB damage from mains spikes.
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Repair Difficulty
Hard
4/5
Required Part
Main Control PCB
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