How to change WIFI networks on Google Chromecast. If you have changed your wifi SSID or password you will need to change them on the Chromecast. To reset the wifi network you will need the Google Home app on your mobile device. The wifi setup will take about 3 min to change networks.
After you connect to a wifi network you will need to add a password. I didn't realize that I wasn't prompted for the password it was the same network I previously connected.