F09
Ariston
EEPROM / Configuration Data Error
Display shows F09 and the oven may behave erratically or not start.
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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 memory on control board, Incorrect or failed software configuration, Power surge damage to EEPROM
How to Fix / Troubleshooting
Safety: Disconnect the appliance from mains before removing the control panel.
- Power reset: Turn off power for at least 15 minutes to fully discharge the control board, then restore power and check if F09 clears.
- Check supply stability: Ensure the range is on a dedicated circuit with correct voltage. Frequent brownouts or surges can corrupt memory.
- Inspect control board: Remove the control panel and visually inspect the PCB for burn marks or corrosion.
- Reprogramming: Some Ariston models require reprogramming or parameter reset using manufacturer tools when F09 occurs. This must be done by an authorised service centre.
- Replace control board: If F09 persists, replace the main control board with the correct Ariston part. Configuration may need to be set according to the service manual.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board (with EEPROM)
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