F14
V-ZUG
Internal Communication Bus Error
Oven shows F14 and will not start; sometimes accompanied by fan running briefly.
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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
Faulty communication between main PCB and display PCB, Damaged communication cable, Electrical noise or surge damage, Defective control board
How to Fix / Troubleshooting
Safety first: Disconnect the oven from mains power before accessing electronics.
Step-by-step checks:
- Inspect communication harness: Locate the multi-core cable between the main PCB and the user interface/display board. Check for pinched, cut, or burnt sections.
- Reseat connectors: Unplug and reconnect both ends of the harness to ensure good contact.
- Check for corrosion: Look for green or white deposits on connector pins; clean gently with contact cleaner and a soft brush.
- Power cycle: Restore power and see if F14 clears. If the error returns, one of the boards is likely defective.
When to call a technician: Board-level diagnosis and replacement should be performed by an authorized V-ZUG service technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Main PCB or Display PCB
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