E15
LG Wi‑Fi Module / Antenna Fault

Robot vacuum displays a Wi‑Fi or connectivity error (E15); it cannot connect to the LG ThinQ app or loses connection frequently.

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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

Weak home Wi‑Fi signal at dock location, Incorrect Wi‑Fi password or unsupported band, Damaged internal Wi‑Fi antenna, Failed Wi‑Fi module on main PCB

How to Fix / Troubleshooting

Safety first: Network changes do not require opening the robot; only open the unit if you are qualified.

  • 1. Check Wi‑Fi band: Ensure your router is broadcasting a 2.4 GHz network; many robot vacuums do not support 5 GHz only networks.
  • 2. Move dock closer to router: Temporarily place the dock and robot closer to your router to test connectivity.
  • 3. Reset network settings: On the robot, perform a network reset (refer to the user manual; often involves holding a specific button combination). Then re-add the robot in the LG ThinQ app.
  • 4. Verify password and SSID: Ensure you are entering the correct Wi‑Fi password and that the SSID does not contain unusual characters.
  • If the robot cannot detect any networks even near the router, the internal Wi‑Fi antenna or module may be faulty and require main PCB or antenna replacement.
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Repair Difficulty

Medium 3/5

Required Part

Wi‑Fi Antenna / Main PCB
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