E6
Honeywell
Internal Communication or Control Board Fault
Dehumidifier shows E6 and stops; fan may or may not run.
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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
Main control board failure, Corrupted firmware, Loose harness between display board and main PCB, Power surge damage
How to Fix / Troubleshooting
Safety: Unplug the unit before opening the control panel.
Steps:
- Hard reset: Unplug the dehumidifier for at least 10 minutes. Press and hold the power button (if accessible) for 10 seconds while unplugged to discharge residual power, then reconnect.
- Check power source: Plug the unit directly into a wall outlet (no extension cord or power strip). Verify the outlet is properly grounded and not shared with heavy loads.
- Inspect control wiring: Remove the control panel cover and verify the ribbon cable or harness between the display/control panel and main PCB is fully seated and not damaged.
- Look for board damage: Examine the main PCB for burnt components, bulging capacitors, or corrosion. Any visible damage usually requires board replacement.
- Replace control board: If wiring is intact and E6 persists, replace the main control board with the correct Honeywell part number for your model.
Tip: Use anti‑static precautions (ESD strap) when handling electronic boards to avoid further damage.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board (PCB)
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