Change Your Chromecast's WiFi in the Google Home App

The fastest way to switch your Chromecast to a different WiFi network 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 "WiFi", and select "Forget This Network". Your Chromecast will then ask you to choose a new network and enter the password. The whole process takes about two minutes.

If you have multiple Chromecast devices, the Google Home app shows each one separately, so you can change them one at a time or all at once. The app works on both Android and iOS, and you do not need to be standing next to the device — as long as your phone is on the same network as the Chromecast, you can make the change from anywhere in your home.

Key Takeaways

  • The Google Home app is the standard method: open it, find your device, tap settings, choose WiFi, and select "Forget This Network" to switch to a new one.
  • You can change networks without unplugging the Chromecast or resetting it to factory settings.
  • If the Google Home app does not show your Chromecast, make sure your phone is connected to the same WiFi network the device is currently using.
  • After you forget the old network, your Chromecast will display available networks on your TV screen so you can pick the new one and enter its password.
  • Some older Chromecast models may require you to use the physical reset button if the app method does not work, though this is rare.

What Happens When You Forget a Network

When you select "Forget This Network" in the Google Home app, your Chromecast erases the stored password and connection details for that WiFi. It does not reset the device itself — your casting history, paired accounts, and other settings stay the same. The Chromecast straightforward disconnects and waits for you to tell it which network to join next.

After you forget the network, your Chromecast will show a list of available WiFi networks directly on your TV screen. You select the new network from that list and type in the password using your remote or phone. This is the same process you would use if you were setting up the Chromecast for the first time, except your device keeps all its other configuration.

When the Google Home App Does Not Show Your Device

If your Chromecast does not appear in the Google Home app, the most common reason is that your phone is not connected to the same WiFi network as the device. The app needs to communicate with the Chromecast over your local network, so both must be on the same WiFi. Switch your phone to the network your Chromecast is currently using, wait a few seconds, and the device should appear in the app.

If it still does not show up, try closing and reopening the Google Home app, or restart your phone. If you have recently changed your router or network name, your Chromecast may be trying to connect to an old network that no longer exists — in that case, you will need to use the physical reset button on the device (usually on the back or bottom) to restore it to factory settings and set it up again from the beginning.

Using the Physical Reset Button as a Last Resort

Every Chromecast has a small reset button, usually recessed so you need a paperclip or similar tool to press it. Hold the button for about 10 to 15 seconds while the device is plugged in. The light on the Chromecast will blink and change color — when it stops blinking and returns to a steady state, the reset is complete. The device will then restart and show the setup screen on your TV, as if it were brand new.

Resetting erases all stored networks, paired accounts, and settings, so use this only if the app method fails or if your Chromecast is stuck trying to connect to a network that no longer exists. After a reset, you will need to go through the full setup process again, including signing into your Google account and choosing your WiFi network. Most people never need to do this — the app method works in nearly all cases.

Switching Between Multiple Networks

If you have a Chromecast in a room with both a 2.4 GHz and 5 GHz WiFi network available (often labeled with different names like "MyNetwork" and "MyNetwork-5G"), you can choose which one to use. The 5 GHz network is faster but has shorter range, while 2.4 GHz is slower but reaches farther. When you forget the old network and select a new one, straightforward pick the band that works best for your setup.

Some routers broadcast both bands under the same name and automatically switch your device between them. If that is the case, you do not need to do anything — your Chromecast will use whichever band has the strongest signal. If your router uses separate names for each band, you can pick the one that gives you the most stable connection in that room.

Troubleshooting Connection Problems After Switching Networks

If your Chromecast connects to the new network but then keeps disconnecting, the most likely cause is a weak signal. Move the device closer to your router, or move the router to a more central location in your home. If that is not possible, try switching to the 2.4 GHz band, which penetrates walls better than 5 GHz, even though it is slower.

If the Chromecast connects but casting does not work, make sure your phone or computer is on the same WiFi network. Casting requires both devices to be on the same local network — if your phone is on a guest network or a different band, it will not see the Chromecast. Also check that you have not accidentally blocked the Chromecast in your router's settings or parental controls.

Frequently Asked Questions

Do I lose my Google account or casting history when I change WiFi?

No. Changing the WiFi network does not affect your Google account, casting history, or any other settings on the Chromecast. Only the network connection itself changes. Your device will still be signed into the same account and will remember all your previous casts.

Can I change the WiFi without using the Google Home app?

Yes, if you have access to the Chromecast's physical reset button. Press and hold it for 10 to 15 seconds to reset the device, then set it up again from scratch on your TV. This is more work than using the app, but it works if the app is not available or if your phone cannot connect to the current network.

What if I forget the password to my new WiFi network?

You will need to find or reset the password on your router before the Chromecast can connect. Check your router's label for the default password, or log into your router's admin panel (usually through a web browser) to view or change the WiFi password. Once you have the correct password, enter it when the Chromecast asks for it.

How long does it take for the Chromecast to connect to the new network?

Usually 30 seconds to two minutes. After you enter the password, the Chromecast will search for the network, authenticate, and connect. You will see a confirmation message on your TV when it is done. If it takes longer than five minutes, the password may be wrong or the signal may be too weak.

Can I change the WiFi on a Chromecast that is already casting?

No. You should stop casting first, then change the network. If you try to change the network while actively casting, the connection will drop and the cast will stop. Wait until you are done casting, then use the Google Home app to switch networks.