Connect Chromecast to your new WiFi in five steps

To set up Chromecast on a new WiFi network, plug the device into your TV's HDMI port and power it on, then use the Google Home app on your phone to walk through the setup wizard. The app will detect your Chromecast, ask you to confirm the four-digit code shown on your TV screen, let you select your WiFi network and enter the password, and then test the connection. The whole process takes about five minutes if your phone and Chromecast are in the same room.

If you already own a Chromecast and are switching to a new WiFi network—whether you changed providers, moved, or upgraded your router—you do not need to reset the device. You can update the WiFi connection directly in the Google Home app without unplugging anything.

Key Takeaways

  • You need the Google Home app on an Android or iPhone to set up Chromecast; the device itself has no buttons or screen for WiFi entry.
  • Your phone must be on the same WiFi network as Chromecast during setup, so connect to your new network first before starting the wizard.
  • Chromecast will ask for your WiFi password during setup; have it ready, and note that it is case-sensitive.
  • If setup fails, restart your Chromecast by unplugging it for 30 seconds, then try again with your phone closer to the device.
  • Once connected, you can cast from any phone, tablet, or computer on the same WiFi network, even if it was not the device that set it up.

What you need before you start

Gather these items before you plug in your Chromecast: the Chromecast device itself, a TV with an available HDMI port, a power source (either the included USB cable plugged into the TV or a wall outlet with the included power adapter), your new WiFi network name and password, and a smartphone or tablet with the Google Home app installed.

The Google Home app is free and available on both Android and iPhone. read it from the Google Play Store or Apple App Store if you do not already have it. Your phone does not need to be the same brand as your Chromecast—an iPhone can set up a Chromecast just as easily as an Android phone.

Make sure your phone is already connected to your new WiFi network before you start the setup wizard. Chromecast needs your phone to be on the same network to communicate during setup.

Step-by-step setup for a new Chromecast

Step 1: Plug in and power on. Insert the Chromecast into an available HDMI port on your TV. Plug the power cable into the device—either use the USB port on the TV itself (if it provides power) or plug the included power adapter into a wall outlet. Your TV should display the Chromecast setup screen within 30 seconds, showing a colorful Google logo and a four-digit code.

Step 2: Open Google Home and start setup. On your phone, open the Google Home app. Tap the "+" button (usually in the top left corner) and select "Set up device." Choose "Set up a new device" and let the app search for nearby Chromecast devices. When your Chromecast appears in the list, tap it.

Step 3: Confirm the setup code. The app will show you a four-digit code and ask you to confirm it matches the code on your TV screen. This step verifies that you are setting up your own device, not someone else's. If the codes match, tap "Yes" to continue.

Step 4: Select your WiFi network and enter the password. The app will show a list of available WiFi networks. Tap your new network name. When prompted, type your WiFi password exactly as it appears—passwords are case-sensitive, so "MyPassword" is different from "mypassword." Tap "Next" when you are done.

Step 5: Wait for connection and name your device. The app will connect Chromecast to your WiFi and test the connection. This usually takes 30 to 60 seconds. Once connected, you can give your Chromecast a name (like "Living Room TV" or "Bedroom Chromecast") so you can identify it when casting from multiple devices. Tap "Next" to finish.

Updating WiFi on a Chromecast you already own

If you already have a Chromecast set up on an old WiFi network and need to connect it to a new one, you do not have to reset the device or start from scratch. Open the Google Home app, find your Chromecast in the device list, tap the settings icon (three dots or a gear), and select "WiFi." The app will show your current network and let you select a new one. Enter your new password and the device will reconnect within a minute.

This method works as long as your phone can still reach the Chromecast on the old network. If your old router is already off or gone, you will need to reset the Chromecast and set it up as new. To reset, unplug the device for 30 seconds, plug it back in, and follow the five-step setup process above.

Troubleshooting when setup fails

If the Google Home app cannot find your Chromecast, the most common cause is that your phone is not on the same WiFi network as the device. Check your phone's WiFi settings and make sure it is connected to your new network, not your old one or a mobile hotspot. Then open Google Home again and try the setup wizard.

If your phone finds the Chromecast but the connection fails after you enter your WiFi password, the password is usually the culprit. Unplug the Chromecast, wait 30 seconds, plug it back in, and try again. This time, type your password more slowly and double-check for capital letters, numbers, or special characters. If you are unsure of your password, check your router's label or log into your router's admin page from a computer.

If the setup code does not match between your phone and TV, or if the app says "Device not found," move your phone closer to the Chromecast and try again. Walls and distance can interfere with the Bluetooth signal that the app uses to communicate with the device during setup. Once setup is complete, Chromecast will work from anywhere on your WiFi network.

What to do after setup is complete

Once your Chromecast is connected to your new WiFi, you can cast to it from any device on the same network. Open a compatible app like YouTube, Netflix, Spotify, or Google Photos, tap the cast icon (it looks like a rectangle with WiFi waves), select your Chromecast by name, and the content will play on your TV.

You do not need to use the same phone that set up the device. Any phone, tablet, or computer on your WiFi can cast to your Chromecast. You also do not need to sign in with the same Google account that set up the device, though some apps may ask you to sign in with your own account to cast.

If you want to change your Chromecast's name, WiFi network, or other settings later, open Google Home, find the device, tap the settings icon, and select the option you want to change. You can also use voice commands with a Google Home speaker or your phone's Google Assistant to control playback on your Chromecast.

Frequently Asked Questions

Can I set up Chromecast without the Google Home app?

No, the Google Home app is the only way to set up Chromecast. The device itself has no buttons, screen, or menu—it relies entirely on the app to receive your WiFi password and complete the connection. You must read the app before you can use the device.

What if my WiFi password has special characters or spaces?

Type it exactly as it appears, including spaces, numbers, and symbols like ! @ # $ % ^ & *. WiFi passwords are case-sensitive, so uppercase and lowercase letters matter. If setup fails, check your router's label or your provider's paperwork to confirm the exact password.

Do I need a Google account to set up Chromecast?

Yes, you need a Google account to use the Google Home app and set up the device. You do not need to create a new account—you can use an existing Gmail, YouTube, or other Google account. The account is tied to the device so you can manage it later.

Can I use Chromecast on a 2.4 GHz and 5 GHz network at the same time?

Chromecast works on both 2.4 GHz and 5 GHz networks, but you set it up on one or the other during the WiFi selection step. If your router broadcasts both bands with the same network name, select the one that gives you the strongest signal in the room where your TV is located. You can change this later in the Google Home app settings.

What if I forgot my new WiFi password?

If you do not know your new WiFi password, log into your router's admin page from a computer or phone. The router's IP address and login details are usually on a sticker on the back of the device. Once logged in, you can view or reset your WiFi password. Alternatively, contact your internet provider—they can tell you the password or help you reset it.