Start with the basics: power, Wi-Fi, and the app

Most Chromecast problems come down to three things: the device is not powered on, your phone or computer is not on the same Wi-Fi network, or the Chromecast app on your phone has not been updated. Before you troubleshoot anything else, check these first.

Plug the Chromecast directly into your TV's HDMI port and into a power outlet or USB port. Wait 30 seconds for it to boot. The LED light on the device should turn white when it is ready. If the light stays off or red, the device is not getting power — try a different outlet or USB port on your TV.

Open the Google Home app on your phone or tablet. Make sure your phone is connected to the same Wi-Fi network as your Chromecast. If your phone is on a different network — or on a 5GHz band while Chromecast is on 2.4GHz — they cannot see each other. Check your router settings or switch your phone to the correct band.

Key Takeaways

  • Chromecast needs power, the correct HDMI input selected on your TV, and your phone on the same Wi-Fi network to work at all.
  • The Google Home app must be installed and up to date on your phone before you can cast anything to the device.
  • If Chromecast appears in the app but casting fails, restart both the Chromecast and the app you are trying to cast from.
  • Older Chromecast models and some streaming apps do not work together, so check whether your device and app are compatible.
  • If the Chromecast is not showing up in the Google Home app at all, forget the network on the device and reconnect it to Wi-Fi from scratch.

The TV is not showing the Chromecast input

Even if the Chromecast is powered on and connected to Wi-Fi, your TV will not display anything unless you switch to the correct HDMI input. Use your TV remote to cycle through the inputs until you see the Chromecast setup screen or a blank screen with the Google logo.

If you see nothing on any input, the Chromecast may not be getting power. Check the power cable or USB connection again. Some TVs do not supply enough power through the USB port — if you are using a USB cable, switch to a wall outlet instead.

The Chromecast does not appear in the Google Home app

If you have powered on the device and switched to the correct input but the Chromecast does not show up in the Google Home app, the device and your phone are not on the same network. Open the Google Home app, tap the plus icon to add a device, and select "Set up device." The app will scan for Chromecast devices on your network.

If the scan finds nothing, restart both your phone and the Chromecast. Unplug the Chromecast for 10 seconds, plug it back in, and wait for the LED to turn white. Then restart the Google Home app on your phone. If it still does not appear, your phone and Chromecast may be on different Wi-Fi bands. Log into your router settings and check whether your network is broadcasting both 2.4GHz and 5GHz. Chromecast works on 2.4GHz only, so make sure your phone connects to that band.

If your router only broadcasts 5GHz, you will need to enable the 2.4GHz band or buy a router that supports both. Some newer routers have this as a setting you can turn on without buying new hardware.

Casting starts but stops or plays nothing

If the Chromecast appears in the app and you can start casting, but the video does not play or stops after a few seconds, the problem is usually a weak Wi-Fi signal or an app that does not support casting. Move the Chromecast closer to your router or remove obstacles between them. If the signal is still weak, consider a Wi-Fi extender or moving your router.

Not every app supports casting to Chromecast. Netflix, YouTube, Spotify, and Google Play Movies work reliably. Some apps like Apple TV+ and Disney+ have limited casting support or require a paid subscription to cast. Check the app's settings or help page to confirm it supports Chromecast.

If the app does support casting, close the app completely on your phone and restart it. Then restart the Chromecast by unplugging it for 10 seconds. Try casting again. If it still fails, restart your phone as well.

Your Chromecast is too old for the app or network

Chromecast devices released before 2015 may not work with newer versions of the Google Home app or with some streaming services. If you own an older Chromecast and casting fails even after restarting, check the device's model number on the back. You can search that number on Google to find out when it was made and whether it is still supported.

Newer apps and services sometimes drop support for older hardware. If your Chromecast is more than five years old and casting is unreliable, the device may straightforward be too old for the current software. In that case, a newer Chromecast or Chromecast with Google TV will work with all current apps and services.

The Chromecast is connected but casting is slow or choppy

If video plays but stutters, buffers, or lags, the problem is almost always Wi-Fi bandwidth. Chromecast streams video over Wi-Fi, so if your network is slow or crowded, playback suffers. Check your internet speed using a speed test app on your phone. You need at least 5 Mbps for smooth HD video and 25 Mbps for 4K.

If your speed is good but casting is still choppy, other devices on your network may be using bandwidth. Close apps on your phone, pause downloads on other devices, and move the Chromecast closer to your router. If you have many devices on your Wi-Fi, consider upgrading to a faster router or switching to a less crowded Wi-Fi band.

Resetting the Chromecast to factory settings

If none of the above steps work, reset the Chromecast to its original state. Unplug the device, wait 10 seconds, and plug it back in. While it is booting, hold down the reset button on the back of the device for 15 seconds. The LED will blink yellow, then white. Release the button and wait for the device to restart.

Once the LED turns white, open the Google Home app and set up the Chromecast again as if it were new. Select your Wi-Fi network, enter the password, and wait for the setup to finish. This clears out any corrupted settings that may have been blocking the device from working.

Frequently Asked Questions

Why does my Chromecast keep disconnecting from Wi-Fi?

Chromecast disconnects when the Wi-Fi signal is weak or when your router is dropping the connection. Move the device closer to the router, remove obstacles like walls or metal objects, and restart your router by unplugging it for 30 seconds. If disconnections continue, your router may need a firmware update or your Wi-Fi channel may be crowded — check your router settings or contact your internet provider.

Can I use Chromecast without the Google Home app?

No. The Google Home app is required to set up Chromecast and to cast from most apps. Some apps like YouTube and Netflix have a built-in cast button that uses the Google Home app in the background, but you still need the app installed on your phone for it to work.

Why does my phone not see the Chromecast even though it is powered on?

Your phone and Chromecast are on different Wi-Fi networks or different frequency bands. Make sure both are connected to the same network name. If your router broadcasts both 2.4GHz and 5GHz, connect your phone to the 2.4GHz band — Chromecast only works on 2.4GHz. Restart both devices and try again.

Does Chromecast work with all streaming services?

Most major services like Netflix, YouTube, Spotify, and Disney+ support casting, but some have restrictions. Apple TV+ and HBO Max require a paid subscription to cast. Check the app's settings to see if a cast button is available. If the button is missing, that app does not support casting to Chromecast.

What should I do if the Chromecast LED is red?

A red LED means the device is overheating or has a power problem. Unplug the Chromecast and let it cool for 10 minutes. Make sure it is not in direct sunlight or near a heat source. Plug it back in and check whether the LED turns white. If it stays red, try a different power outlet or USB port.