F6
Gaggenau
Communication Error Between Display and Power/Relay Board
Oven display shows F6, oven may not respond to temperature settings
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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 harness between display and relay board, Faulty display module, Defective relay/power board, Electrical noise or surge damage
How to Fix / Troubleshooting
Safety: Disconnect power at the breaker before removing the control panel or back cover.
- Power reset: Turn off power for 5–10 minutes, then restore and test.
- Inspect harness (technician): Remove the control panel and back cover to access the display module and relay/power board. Check connectors for secure fit and no corrosion.
- Check for damage: Look for burnt spots or cracked solder joints on both boards.
- Reseat connectors: Disconnect and reconnect the communication harness to ensure good contact.
- Replace modules as needed: If F6 persists, replace the display/user interface board. If still present, replace the relay/power board.
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Repair Difficulty
Hard
4/5
Required Part
Display / User Interface Board
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