F18
Hotpoint-Ariston
Microprocessor / Communication Error
Machine freezes mid-cycle or will not start; F18 displayed; sometimes accompanied by erratic behavior.
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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
Internal microcontroller fault, Severe electrical noise or surge, Corrupted firmware, Faulty main control board
How to Fix / Troubleshooting
Safety: Disconnect power before any inspection.
- Extended power reset:
- Unplug the machine for at least 30–60 minutes.
- Reconnect and attempt a short cycle.
- Check mains supply:
- Ensure the outlet is properly grounded and not shared with heavy inductive loads.
- Consider using a surge protector.
- Inspect control board:
- Look for obvious damage (burn marks, cracked components).
- Resolution: In most cases, F18 requires replacement of the main control board. Firmware reprogramming, if supported, must be done by an authorized service center.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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