Hi Merrill,
Not necessarily. You can usually update their Wi-Fi settings using the Google Home app.
- Open the Google Home app.
- At the top left, tap Add + > Set up device > New device > set up new devices in your home.
- Follow the in-app steps.
If these steps above don’t solve the issue, you’ll need to
factory reset your speaker or display, then
set it up again using your new Wi-Fi network and password.
Instead of factory resetting your speaker or display, if you're comfortable changing your router settings, you can change your new Wi-Fi network name and password in your router's settings to be the same as the previous ones. Your device should then automatically connect to the Wi-Fi.
