The Wemo App is not finding my Light Switch during setup
Make sure your Light Switch is powered ON and the ring light is blinking BLUE. Â If it is not blinking BLUE, these tips might help.
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-  If the ring light is OFF or solid WHITE, the Light Switch may already be connected to your Wi-Fi. Close and reopen the Wemo App while connected to your 2.4 GHz Wi-Fi band (same as your Light Switch).
- Â Still not seeing your Light Switch? Â Restore Light Switch to factory settings. Â See how
My Wi-Fi doesn’t appear in the Wemo App
Do you have at least two Wi-Fi bars on your smartphone? If not, you may be experiencing some interference.
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-  Close the Wemo App and restart your router. Reopen the Wemo App.
- Â If your Wi-Fi is still not showing up in the Wemo App, you may not have a strong Wi-Fi signal in the area where you are installing the Wemo Light Switch. Â We recommend either installing the Light Switch in an area where there is a strong signal or upgrading your router to provide adequate Wi-Fi coverage.
The Wemo App keeps crashing and/or freezing
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- Â Force quit and reopen the Wemo App.
-  If that didn’t work, delete the app, reinstall it, and open it again.
Replacing a router or changing Wi-Fi name
If you get a new router or change your Wi-Fi name and/or password, you can connect to the new Wi-Fi without losing your Wemo Light Switch’s settings.
- Â Press and hold the bar underneath the ON/OFF switch.
- Â Keep pressing until the ring light turns BLUE, then release.
- Â Open the Wemo App to set up and connect your Wemo Light Switch to Wi-Fi.
Some other problem with your Wemo Light Switch
-  Wi-Fi can be finicky and many problems are solved with a simple power cycle. Unplug your router, wait 10 seconds and plug it back in.
-   If that doesn’t work, restore your Wemo Light Switch to factory defaults.
- Press and hold the bar underneath the ON/OFF switch.
- Keep pressing until the ring light turns RED, then release.
- When the ring light turns BLUE, it is ready for setup.
Related Article:
Restarting or resetting the Wemo Light Switches (Wemo WLS0403 and WLS040)