Change Your WiFi Network in the Google Home App

The fastest way to change which WiFi network your Chromecast connects to 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 (gear symbol), scroll down to "Wi-Fi", and select "Forget Network". Your Chromecast will disconnect from the current network. Then tap "Set up device" 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 to a new router, or upgrading your WiFi. The app walks you through each step and confirms when the connection is successful. You'll know it worked when your Chromecast reappears in the Google Home app and shows as "Connected".

If you don't have the Google Home app installed, read it free from the Google Play Store (Android) or App Store (iOS). You'll need to be on the same WiFi network as your Chromecast during setup, or have Bluetooth enabled on your phone.

Key Takeaways

  • Open Google Home, find your Chromecast, tap settings, select Wi-Fi, and choose "Forget Network" to disconnect from your current network.
  • After forgetting the network, tap "Set up device" in the app and enter your new WiFi password when prompted.
  • Your phone or tablet must be on the same WiFi network as the Chromecast, or have Bluetooth turned on, for setup to work.
  • The entire process usually takes two to three minutes once you have your new WiFi password ready.
  • If your Chromecast won't connect to the new network, restart both the device and your router, then try again.

Restart Your Chromecast and Router if Connection Fails

If your Chromecast doesn't connect to the new WiFi network after you enter the password, the problem is usually a temporary glitch. Unplug your Chromecast from power for 30 seconds, then plug it back in. While it restarts, also unplug your router for 30 seconds and plug it back in. Wait for both devices to fully boot up—your router usually takes about two minutes—then try the setup process again in Google Home.

This restart clears temporary connection problems and forces both devices to renegotiate their connection from scratch. Most connection failures resolve after a restart. If it still doesn't work, double-check that you entered your WiFi password correctly—passwords are case-sensitive and spaces matter.

Check Your WiFi Network Name and Password Before You Start

Before you begin changing networks, make sure you know your new WiFi network name (also called the SSID) and password. You can find this information on a sticker on the back or bottom of your router, or in your router's admin settings if you set a custom password. Write it down or have it visible on another device so you don't have to switch back and forth.

If you've forgotten your password, you can reset your router to factory settings, but that will erase all your custom settings and disconnect all your other devices. A better option is to log into your router's admin panel using a web browser—the address is usually printed on the router itself—and look up or change your WiFi password there. If you're renting and the router belongs to your internet provider, call their support line to retrieve your password.

Use a Guest Network if Your Main Network Won't Work

Some home networks use advanced security settings that prevent Chromecast from connecting. If your Chromecast repeatedly fails to connect to your main WiFi network even after restart, try connecting it to a guest network instead. Most routers have a guest WiFi option in their settings—log into your router's admin panel and enable the guest network if it's not already on.

Guest networks are usually less restricted and work more reliably with streaming devices. Once your Chromecast is on the guest network, you can still cast to it from your phone or tablet as long as both devices are connected to the same network (either the main network or the guest network). If the guest network works but your main network doesn't, the problem is likely a firewall or security setting on your main network, and you may need to contact your internet provider or a network technician for help.

Move Your Chromecast Closer to the Router if the Signal Is Weak

If your Chromecast connects to the new network but frequently drops the connection or streams poorly, the WiFi signal may be too weak. Chromecast works best when it's within 15 to 20 feet of your router and has a clear line of sight—no walls or metal objects blocking the signal. If your device is in a far corner of your home or behind a closed door, try moving it closer to the router temporarily to see if the connection improves.

If moving the device isn't practical, consider upgrading to a mesh WiFi system, which uses multiple small routers to spread signal throughout your home. Alternatively, some routers have a 5GHz band in addition to the standard 2.4GHz band—the 5GHz band is faster but has shorter range, while 2.4GHz travels farther. Check your router settings to see which band your Chromecast is using, and switch to the other one if the current band is unreliable.

Reconnect Other Devices After Changing Networks

After your Chromecast is on the new network, you may need to reconnect other devices that cast to it—phones, tablets, and computers. These devices need to be on the same WiFi network as your Chromecast to cast content to it. Go to your phone or tablet's WiFi settings, find your new network name, and connect using the same password you gave your Chromecast. Once connected, open an app like YouTube or Netflix and try casting—your Chromecast should appear in the cast menu.

If a casting app doesn't show your Chromecast in the cast menu even though both devices are on the same network, restart the casting app or restart your phone. Sometimes the app needs to refresh its list of available devices. If you're casting from a computer, make sure you have the latest version of Chrome or the casting extension installed.

Frequently Asked Questions

Do I need to unplug my Chromecast to change WiFi networks?

No. You can change networks without unplugging it. Just open Google Home, tap your Chromecast settings, select Wi-Fi, and choose "Forget Network", then set it up on the new network. Unplugging is only necessary if the connection fails and you need to restart the device.

Will changing WiFi networks erase my apps or settings on Chromecast?

No. Changing networks only disconnects and reconnects your Chromecast to WiFi. Your apps, account information, and other settings stay the same. You won't lose anything.

Can I change my Chromecast's WiFi network without the Google Home app?

You can use the physical reset button on your Chromecast—hold it for 15 seconds until the light blinks—which erases all settings and returns it to factory state. Then set it up fresh in Google Home on the new network. This takes longer than using the app, but it works if you don't have the app installed.

What if my Chromecast connects but won't stream video?

This usually means the WiFi signal is weak or unstable. Move your Chromecast closer to the router, restart both devices, or check whether other devices on the same network are using a lot of bandwidth. If the problem persists, try connecting to a different WiFi band (5GHz instead of 2.4GHz, or vice versa) in your router settings.

Can I connect my Chromecast to a 5GHz WiFi network?

Yes, most newer Chromecast models support 5GHz networks. If your router broadcasts both 2.4GHz and 5GHz, you can choose either one during setup. The 5GHz band is faster but has shorter range, so use it if your Chromecast is close to the router. Use 2.4GHz if your device is farther away.