Start with the simplest fixes first
Most Chromecast problems come from three things: the device lost power or connection, your phone or computer isn't on the same Wi-Fi network, or the Chromecast app needs to restart. Before you troubleshoot anything else, unplug your Chromecast from power for 30 seconds, then plug it back in. While it restarts, check that your phone or computer is connected to the exact same Wi-Fi network—not a guest network or a different band of the same network.
Once the Chromecast finishes restarting (the light on the device will stop blinking), open the Google Home app on your phone or the Chrome browser on your computer and try casting again. If that does not work, force-close the Google Home app completely and reopen it. On most phones, swipe up from the bottom of the screen to see all open apps, find Google Home, and swipe it away. Then tap the app icon again to start fresh.
Key Takeaways
- Unplug your Chromecast for 30 seconds and plug it back in—this fixes most connection problems.
- Your phone or computer must be on the same Wi-Fi network as your Chromecast, not a guest network or different frequency band.
- Force-close and reopen the Google Home app or restart your browser to clear temporary glitches.
- If your Chromecast is not showing up in the app at all, check that it is plugged into power and that your router is broadcasting a 2.4 GHz signal.
- When nothing else works, factory reset your Chromecast by holding the button on the back for 15 seconds until the light flashes orange.
Your Chromecast is not showing up in the Google Home app
If you open Google Home and do not see your Chromecast listed under "Devices," the app cannot find it on your network. First, make sure the Chromecast is plugged into a working power outlet—the light on the device should be on. If the light is off, try a different outlet or a different USB cable if you are using a Chromecast with Google TV.
Next, check your Wi-Fi router. Your Chromecast connects only to 2.4 GHz Wi-Fi, not 5 GHz. Many routers broadcast both frequencies at once under the same network name. If your router has a separate 2.4 GHz network name (often labeled with "2.4" or "-2G" in the name), connect your phone to that network first, then try opening Google Home again. If your router only broadcasts 5 GHz, you will need to change the router settings to enable 2.4 GHz, or contact your internet provider for help.
If the Chromecast is powered and your phone is on a 2.4 GHz network but the device still does not appear, restart your router. Unplug it for 30 seconds, plug it back in, and wait two minutes for it to fully restart. Then try opening Google Home again.
Your phone or computer cannot find the cast button
The cast button appears in apps like YouTube, Netflix, Spotify, and Google Photos, but only if your phone or computer is on the same Wi-Fi network as your Chromecast. If you do not see the cast button in an app, the first thing to check is your Wi-Fi connection. Open your phone's Wi-Fi settings and confirm you are connected to the same network name as your Chromecast—not a guest network, and not a different frequency band if your router splits them.
If you are on the correct network, close the app completely and reopen it. Some apps cache the cast button and do not refresh it when you switch networks. On Android, go to Settings, then Apps, find the app you are trying to cast from, tap "Force Stop," and then reopen the app. On iPhone or Mac, swipe the app away from the app switcher or quit it from the menu, then reopen it.
If you are casting from a computer using Google Chrome, make sure you are using the Chrome browser itself, not Edge or Safari. The cast button only works in Chrome. You can also cast a Chrome tab by clicking the three-dot menu in the top right, selecting "Cast," and choosing your Chromecast.
Your Chromecast connects but then disconnects or freezes
If your Chromecast appears in Google Home, you can start casting, but the connection drops or the video freezes, the problem is usually Wi-Fi signal strength or interference. Chromecast devices are sensitive to weak or unstable Wi-Fi. Move your Chromecast closer to your router, or move your router to a more central location in your home. Avoid placing the Chromecast behind a TV or inside a cabinet, as metal and dense materials block the signal.
Check what other devices are using your 2.4 GHz network. Microwaves, cordless phones, and baby monitors all broadcast on the same 2.4 GHz frequency and can interfere with Wi-Fi. If possible, move these devices away from your router and Chromecast, or switch them off while you are casting.
If moving the device does not help, restart your router again. Unplug it for 30 seconds, plug it back in, and wait for it to fully restart before casting. If the problem continues, check your router's Wi-Fi settings. Some routers have a setting called "Band Steering" or "Smart Connect" that automatically switches devices between 2.4 GHz and 5 GHz. Disable this setting if you can—Chromecast works better when it stays on 2.4 GHz. You may need to log into your router's admin page to change this. Your router's manual or the sticker on the back will show you how to access it.
Your Chromecast is plugged in but the light is off or stuck
If the light on your Chromecast is completely dark, the device is not getting power. Try a different power outlet first—the outlet you are using may be off or broken. If you are using a USB cable, try a different cable. Some USB cables are designed for data only and do not carry power. If you have a phone charger with a USB-C or Micro-USB port, try that instead.
If the light is on but stuck on one color (not blinking or changing), the device may be frozen. Unplug it for 30 seconds and plug it back in. If the light stays solid red or does not change after restarting, the device may have a hardware problem and may need to be replaced.
Factory reset your Chromecast when nothing else works
If you have tried restarting the device, checking your network, and moving it closer to the router but it still does not work, a factory reset will erase all settings and return it to its original state. On most Chromecast models, locate the small button on the back or bottom of the device. Press and hold this button for 15 seconds until the light flashes orange. Release the button and wait for the device to restart—this takes about one minute.
Once the light stops blinking, open Google Home on your phone. The app will prompt you to set up the Chromecast again. Follow the on-screen steps to connect it to your Wi-Fi network and give it a name. After setup is complete, try casting again.
If you have a Chromecast with Google TV, the reset button is on the back. Hold it for 15 seconds until you see a reset message on the TV screen. The device will restart and ask you to set it up again.
When to contact Google or your device manufacturer
If your Chromecast still does not work after a factory reset, the device itself may be faulty. Contact Google Support through the Google Home app—open the app, tap your profile picture in the top right, select "Settings," then "Help and Feedback." Describe what you have tried and what happens. Google can walk you through additional troubleshooting or arrange a replacement if the device is still under warranty.
If you are casting from a smart TV with built-in Chromecast (sometimes called "Chromecast built-in"), contact the TV manufacturer instead. The troubleshooting steps are the same, but the manufacturer handles warranty and repairs for the TV itself.
Frequently Asked Questions
Why does my Chromecast work sometimes but not other times?
Intermittent problems usually mean weak Wi-Fi signal or interference. Your Chromecast may connect when you are close to the router but drop out when you move to another room. Move your router to a central location, disable other 2.4 GHz devices nearby, or consider a Wi-Fi extender that broadcasts 2.4 GHz if your home is large.
Can I use my Chromecast on a 5 GHz network?
No. Chromecast only works on 2.4 GHz Wi-Fi. If your router broadcasts both frequencies under the same network name, your phone may connect to 5 GHz while your Chromecast tries to use 2.4 GHz, and they will not see each other. Connect your phone to the 2.4 GHz band specifically, or ask your router to broadcast 2.4 GHz as a separate network.
Do I need to set up my Chromecast again after a factory reset?
Yes. A factory reset erases all settings, including your Wi-Fi password and device name. After the reset, open Google Home and follow the setup steps again. The app will guide you through connecting to your network and naming the device.
Why can I see the cast button in some apps but not others?
Not all apps support casting. YouTube, Netflix, Spotify, Google Photos, and most Google apps have the cast button built in. Smaller apps or web browsers may not. If an app does not have a cast button, you can cast your entire phone or computer screen instead using the Google Home app.
What should I do if my Chromecast gets too hot?
Chromecast devices can become warm during use, but if it is too hot to touch, unplug it when ready. Make sure it is not in direct sunlight, inside a cabinet, or covered by anything. Let it cool for 15 minutes, then plug it back in. If it overheats again, the device may have a hardware problem and should be replaced.