3rd generation Chromecast not connecting to new modem

[SOHO19]

I have a new modem with the same ISP. I have changed the WIFI settings on my phone and on the TV to the new modem settings and done a factory reset on the Chromecast device. When I try to set up the connection through Home, I get an initial pairing with matching codes but then I get error messages on Home on my phone saying that there was an error connecting to Chromecast and an error trying to connect to the WIFI although both my phone and the TV show I'm connected to the WIFI through my new modem. Chromecast worked perfectly with my old modem. I have a?Samsung phone and a Kogan 'smart' TV.

[tajennifer]

Hi SOHO19,

Thanks for posting. I'm sorry to hear about the situation that you are experiencing with your Chromecast 3rd Gen not connecting to your new modem. But don't worry, I can help. If you have already processed a factory reset on your Chromecast device and it is still not connecting to the modem, here are other steps that you can try:

 Turn Wi-Fi off, then on from the setup device, then reopen the Home app.

• Force close, then reopen the Home app.
• Uninstall, then reinstall the Home app.
• Turn on Bluetooth.
• Turn on Local Network Access for iOS devices:
  1. Go to your iOS device's Settings app.
  2. Tap Privacy & Security > Local Network.
  3. Turn on Local Network for Google Home .
• Use a different device (phone or tablet) for setup.
• Connect manually to your Chromecast’s service set identifier (SSID).
  1. Open your phone’s Settings app
  2. Tap Wi-Fi > connect to the Chromecast SSID.
  3. Open Google Home.
  4. Set up your device again.

You can check detailed information "Can't establish a Wi-Fi connection to Chromecast" article.

Please let me know if you have more questions. 

Best regards,

Jenny