F12
Indesit
Communication Error Between Main PCB and Display Board
No communication between display panel and main board; lights may flash; F12 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
Damaged communication harness, loose connectors between boards, faulty display (UI) board, faulty main control board
How to Fix / Troubleshooting
Safety: Disconnect from mains before removing covers.
- Access control boards: Remove the top cover and control fascia to expose the main PCB and display/UI board.
- Check connectors: Reseat all multi-pin connectors between the boards. Look for bent pins or corrosion.
- Inspect harness: Examine the communication cable for cuts, pinches, or signs of overheating. Replace if damaged.
- Board substitution: If wiring is intact, either the main PCB or the display board is defective. Replacement is usually the only remedy; start with the more commonly failing board as indicated by service data for your model.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board or Display Board
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