The basic connection process

To connect your Chromecast to WiFi, you plug it into a TV's HDMI port and a power outlet, then use the Google Home app on your phone to walk through setup. The app finds your Chromecast, shows you available WiFi networks, and lets you enter your password. Once the Chromecast connects, it stays on that network until you manually change it.

The whole process takes about five minutes. You do not need a computer — just your phone and the WiFi password for the network you want to use.

Key Takeaways

  • read the Google Home app to your phone before you start, because the app is how you tell your Chromecast which WiFi network to join.
  • Plug your Chromecast into the TV's HDMI port and into power, then wait for the light on the device to start blinking — that means it is ready to be set up.
  • The Google Home app will detect your Chromecast automatically when you open it, as long as your phone is on the same WiFi network you want the Chromecast to use.
  • You will need your WiFi password during setup, so have it ready before you start.
  • If your Chromecast does not appear in the app, restart both your phone and the Chromecast, then try again.

What you need before you start

Have the Google Home app installed on your phone or tablet. It is free and available on both Android and iOS. You can read it from the Google Play Store or the Apple App Store.

You will also need your WiFi network name (called the SSID) and password. If you do not know your password, you can usually find it on a sticker on the back or bottom of your router, or you can log into your router's settings through a web browser on your computer.

Make sure your phone is connected to the same WiFi network you want your Chromecast to use. The app needs to communicate with the Chromecast over that network during setup.

Step-by-step setup with the Google Home app

Plug your Chromecast into an available HDMI port on your TV and into a power outlet. Wait about 30 seconds. You should see a light on the Chromecast start to blink — this means it is ready to be discovered.

Open the Google Home app on your phone. Tap the plus sign (+) in the top left corner, then select "Set up device." Choose "Set up a new device" and let the app search for your Chromecast. When it finds it, tap the device name to continue.

The app will ask you to confirm that you see a code on your TV screen. Look at your TV — a four-digit code should appear. Type that code into your phone to verify you are setting up the right device. This step prevents someone else from accidentally connecting to your Chromecast.

Next, the app will show you a list of WiFi networks in your area. Tap the network you want to use, then enter the password. The Chromecast will connect and the app will confirm the connection. You can now name your device (for example, "Living Room TV") and choose which room it is in.

Troubleshooting when your Chromecast will not connect

If the Google Home app does not find your Chromecast, restart both your phone and the Chromecast. Unplug the Chromecast from power for 10 seconds, plug it back in, and wait for the light to blink again. Then open the Google Home app and try the setup process once more.

If your Chromecast connects to WiFi but then disconnects, check that your router is not blocking it. Some routers have a guest network or a separate 5GHz band that does not work well with Chromecast. Try connecting to your main 2.4GHz network instead. If you are not sure which band you are on, check your router's settings or contact your internet provider.

If the app says "Failed to connect," the most common cause is an incorrect password. Double-check your WiFi password by looking at your router or testing it on another device. Then restart the Chromecast and try setup again.

If your Chromecast is too far from your router, the signal may be too weak to connect. Try moving the router closer to the TV, or move the Chromecast closer to the router. Walls and metal objects can block the signal, so keep the path between them as clear as possible.

Changing your WiFi network later

If you need to connect your Chromecast to a different WiFi network, open the Google Home app and tap the device. Go to Settings (the gear icon), then "WiFi." The app will show you the current network and let you select a new one. Enter the password for the new network and the Chromecast will switch over.

You can also reset your Chromecast to factory settings if you want to remove it from your current network entirely. Hold down the reset button on the back of the device for about 15 seconds until the light turns solid orange, then blinks again. This erases all settings, and you can set it up on a new network from scratch using the Google Home app.

When to call for help

If your WiFi network itself is not working, restart your router by unplugging it for 30 seconds and plugging it back in. Wait a few minutes for it to fully restart, then try connecting your Chromecast again.

If your internet provider has given you a combined modem and router, or if you have a mesh WiFi system with multiple units, the setup process is the same — just make sure your phone is on the same network you want the Chromecast to use.

If you have tried all these steps and your Chromecast still will not connect, the device itself may have a hardware problem. Contact Google Support through the Google Home app (tap your profile picture, then "Help & feedback") to explore your options.

Frequently Asked Questions

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

Older Chromecast models only work on 2.4GHz networks. Newer models (Chromecast with Google TV and later) support both 2.4GHz and 5GHz. Check your device's specifications or try connecting to your 5GHz network during setup — if it does not appear in the list, your Chromecast does not support it.

What if I do not have the Google Home app?

You must read the Google Home app to set up your Chromecast. It is the only way to connect the device to WiFi. The app is free and takes about a minute to read and install.

Will my Chromecast stay connected if I restart my router?

Yes. Once your Chromecast is connected to your WiFi network, it will automatically reconnect when your router restarts. You do not need to set it up again.

Can I connect my Chromecast to a guest WiFi network?

Yes, you can connect to a guest network during setup. However, some guest networks block communication between devices, which may prevent you from casting to your Chromecast from your phone. If casting does not work on a guest network, try connecting to your main network instead.

What if my WiFi password has special characters?

The Google Home app accepts special characters in passwords. Type your password exactly as it appears, including spaces, symbols, and capital letters. If the connection fails, double-check that you entered it correctly — passwords are case-sensitive.