F12
Ariston
Communication Error Between Display Board and Main PCB
Display not communicating with main board, some lights may flash, F12 shown
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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
Loose or damaged communication harness, Faulty display PCB, Faulty main control PCB
How to Fix / Troubleshooting
Safety first: Disconnect power before removing the control fascia or top cover.
- Check harness connections: Locate the multi‑wire harness or ribbon cable between the display board and main board. Ensure both ends are fully seated and not corroded.
- Inspect for damage: Look for pinched cables, broken conductors, or signs of moisture on the connectors.
- Dry and clean: If there is evidence of condensation, allow the area to dry completely. Clean light corrosion with appropriate contact cleaner.
- Board substitution: If wiring is intact and F12 persists, one of the boards is defective. A technician may substitute a known‑good display or main board to identify the faulty part.
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Repair Difficulty
Hard
4/5
Required Part
Display Control Board
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