F15
Ariston
Communication Failure Between UI Board and Main Control Board
Display shows communication error; oven may be stuck or unresponsive
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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 UI board, Faulty main control board, Electrical noise or surge damage
How to Fix / Troubleshooting
Safety first: Turn off power before removing any panels.
- Inspect harness: Locate the multi-core cable or ribbon connecting the UI board to the main PCB. Ensure both ends are fully seated and locked.
- Check for damage: Look for pinched, cut, or burnt wires along the harness route. Replace the harness if any damage is found.
- Power reset: After reseating connectors, restore power and perform a full reset by turning the oven off and on at the mains.
- Board substitution: If the error persists, determine whether the UI or main board is at fault. In practice, technicians often replace the main control board first, then the UI board if needed.
- Surge protection: Consider using a surge protector to prevent future damage from mains spikes.
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Repair Difficulty
Hard
4/5
Required Part
Communication Harness or Main Control Board
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