C12
Samsung
Wi‑Fi / Communication Module Error
Robot vacuum shows C12 and may not connect properly to Wi‑Fi or the app.
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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
Wi‑Fi module failure on main PCB, Antenna cable disconnected, Firmware corruption, Router incompatibility or signal issues
How to Fix / Troubleshooting
Safety first: This is a low‑risk electronic fault; no special safety beyond normal electrical precautions.
- Reboot robot and router: Power cycle the robot and your Wi‑Fi router. Wait until the router is fully online before reconnecting.
- Reset network settings: Use the robot’s buttons or the app to reset Wi‑Fi settings (refer to the user manual). Re‑add the robot in the Samsung SmartThings or robot vacuum app.
- Check Wi‑Fi band: Ensure your router is broadcasting a 2.4 GHz network, as many Samsung robot vacuums do not support 5 GHz for pairing.
- If C12 persists without network issues: The Wi‑Fi module or antenna on the main PCB may be faulty, requiring board replacement by a service center.
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Repair Difficulty
Medium
3/5
Required Part
Main PCB Assembly
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