F09
Ariston
EEPROM / Software Configuration Error
Washer-dryer behaves erratically, random cycle times, or will not start; F09 displayed.
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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 on main control board, incorrect configuration data, power surge damage, faulty main control board
How to Fix / Troubleshooting
Safety: Disconnect power before accessing electronics.
Actions:
- Power reset: Unplug for at least 15 minutes to fully discharge capacitors, then reconnect and try again.
- Check supply: Ensure stable mains voltage and no loose power plug or outlet issues.
- Board inspection: Remove the control board cover and inspect for burn marks or moisture damage.
- Reprogramming: Some Ariston boards can be reprogrammed with manufacturer tools; this is typically a technician-only procedure.
- Replace board: If F09 persists, replace the main control board with the correct Ariston part number for your model.
Note: After board replacement, some models require configuration or calibration according to the service manual.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board (Power Module)
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