F4
AEG
Wi‑Fi Module / Communication Error
Dehumidifier displays F4 and does not respond to Wi‑Fi or app control (for connected models)
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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
Faulty Wi‑Fi module, Loose Wi‑Fi board connector, Firmware incompatibility, Damaged antenna cable
How to Fix / Troubleshooting
Safety: Unplug the unit before opening the control area.
- Power cycle: Disconnect power for 5 minutes, then reconnect and check if F4 clears.
- Check Wi‑Fi module: Access the control compartment and locate the small Wi‑Fi / connectivity module. Ensure it is firmly seated in its socket and that any antenna wire is intact.
- Reset network settings: Use the control panel to reset network settings (refer to user manual). Reconfigure the connection via the AEG app.
- Firmware update: If available, update the firmware through the app or service procedure.
- Replace Wi‑Fi module: If F4 persists, replace the Wi‑Fi module board. If still unresolved, the main PCB may be at fault.
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Repair Difficulty
Medium
3/5
Required Part
Wi‑Fi Module Board
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