Change Your WiFi Network in the Google Home App

The fastest way to change your Chromecast's WiFi is through the Google Home app on your phone or tablet. Open the app, find your Chromecast device in the list, tap the settings icon (three dots or a gear), scroll down to "Wi-Fi", and select "Forget This Network". Your Chromecast will disconnect from the current network. Then open the WiFi settings on your phone, connect to the temporary Google Chromecast Setup network that appears, go back to the Google Home app, and follow the on-screen steps to connect to your new WiFi network and password.

This method works whether you're switching to a different network entirely, moving your Chromecast to a guest network, or reconnecting after your main network went down. The whole process usually takes two to three minutes.

Key Takeaways

  • The Google Home app is the standard way to change WiFi—open it, find your device, tap settings, select "Wi-Fi", and choose "Forget This Network".
  • After forgetting the network, your phone must connect to the temporary Google Chromecast Setup network before you can add a new one.
  • You will need your new network's name and password ready before you start the process.
  • If the Google Home app method does not work, you can factory reset the Chromecast and set it up from scratch on the new network.

What Happens When You Forget the Network

When you tap "Forget This Network" in the Google Home app, your Chromecast erases the stored WiFi credentials and disconnects when ready. It then enters pairing mode and broadcasts its own temporary network called Google Chromecast Setup (or similar, depending on your model). This temporary network lasts for about 10 minutes, so you need to move quickly to the next step.

Your Chromecast will not reconnect to any network on its own during this window. If you wait too long without completing the setup, the device will time out and you will need to start over by tapping "Forget This Network" again.

Connecting to Your New Network

Once you have forgotten the old network, go to your phone's WiFi settings and look for the Google Chromecast Setup network in the available list. Tap it and connect—you usually do not need a password for this temporary network. Then return to the Google Home app and tap the option to set up a new device or add a network.

The app will detect your Chromecast and show you a list of available WiFi networks. Select your new network from the list, enter the password, and tap "Connect". The Chromecast will join the network and the app will confirm the connection. At this point, your phone can disconnect from the temporary setup network and reconnect to your main WiFi.

Troubleshooting When the App Method Does Not Work

If the Google Home app does not show your Chromecast, or if you cannot find the temporary setup network on your phone, the device may have already timed out of pairing mode. Unplug the Chromecast for 30 seconds, plug it back in, and try again. Make sure your phone is on the same WiFi network as the Chromecast (or on the temporary setup network during the pairing window).

If you still cannot connect, check that your phone's Bluetooth is turned on—the Google Home app uses Bluetooth to communicate with the Chromecast during setup, even though the final connection is WiFi. If Bluetooth is on and the app still does not detect the device, try uninstalling and reinstalling the Google Home app, or use a different phone or tablet to set it up.

Factory Reset as a Last Resort

If the app method fails completely, you can factory reset the Chromecast and set it up from scratch. Locate the small reset button on the device itself (usually on the back or side) and hold it down for about 15 seconds until the light blinks orange. Release the button and wait for the device to restart—this erases all settings and returns it to factory defaults.

Once the reset is complete, the Chromecast will broadcast its setup network again. Use the Google Home app to set it up on your new WiFi network as if it were brand new. This method always works, but it does mean you will need to reconfigure any casting preferences or linked accounts afterward.

Switching Between Networks Without Forgetting

If you have multiple WiFi networks in your home (such as a main network and a guest network), you can add a second network to your Chromecast without forgetting the first one. Open the Google Home app, tap your device settings, scroll to "Wi-Fi", and select "Add Another Network". Follow the same steps as before, but this time the Chromecast will remember both networks and can switch between them.

This is useful if you want your Chromecast to fall back to a guest network if your main network is down, or if you are testing a new router. The device will prioritize the first network you set up, but it will automatically try the second one if the first is unavailable.

What to Do If Your Password Is Wrong

If you enter an incorrect WiFi password, the Chromecast will fail to connect and the Google Home app will show an error. Go back to the WiFi settings in the app and select "Forget This Network", then start the process again with the correct password. Double-check that Caps Lock is off and that you have typed the password exactly as it appears—WiFi passwords are case-sensitive.

If you do not remember your WiFi password, you can find it on your router (usually printed on a sticker on the device) or log into your router's admin page through a web browser on your computer. Once you have the correct password, return to the Google Home app and reconnect.

Frequently Asked Questions

Do I lose my casting history or settings when I change the WiFi?

No. Changing the WiFi network does not erase your Google account, casting history, or any apps you have set up on the Chromecast. Only a factory reset removes those. After you reconnect to the new network, everything will be exactly as it was.

Can I change the WiFi from a computer instead of a phone?

The Google Home app works on phones and tablets, but not on computers. You must use a mobile device to change the WiFi. If you do not have a smartphone, you can borrow one temporarily to complete the setup, or you can factory reset the Chromecast and set it up on the new network using any available phone.

Why does my Chromecast keep disconnecting from the new WiFi?

Weak signal is the most common cause. Move the Chromecast closer to your router, or check whether other devices on the same network are also dropping connection (which suggests a router issue rather than a Chromecast problem). If the signal is strong but the Chromecast still disconnects, try forgetting the network and reconnecting with the correct password, or factory reset and set up again.

How long does it take to change the WiFi?

The entire process usually takes two to five minutes from start to finish. The longest part is waiting for the Chromecast to restart and broadcast its setup network, which takes about 30 seconds. If you are slow with passwords or have connection issues, it may take longer.