C17
Thermomix
Communication / Connectivity Module Fault
C17 error appears when trying to start a guided recipe or when connecting to Cookidoo/cloud services.
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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
Defective Wi-Fi/Bluetooth module, Loose communication cable between display module and main board, Firmware mismatch between modules, Damaged antenna or RF interference
How to Fix / Troubleshooting
Safety first: While this is a low-voltage fault, always unplug before opening the housing.
- Restart and reconnect: Power off the Thermomix, wait 1–2 minutes, then power on and retry the connection process.
- Check network: Ensure your Wi-Fi network is functioning correctly and that the Thermomix is within range.
- Firmware update: If possible, update the firmware via USB or official methods, as some C17 errors are resolved by software updates.
- Module inspection (advanced): With the unit unplugged, check the communication cables between the display/control module and the main PCB. Reseat connectors.
- Service action: If the error persists, the connectivity module or main PCB may need replacement by an authorized service center.
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Repair Difficulty
Medium
3/5
Required Part
Wi-Fi / Connectivity Module
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