Disconnect Your Chromecast in Three Steps

To disconnect a Chromecast from your WiFi network, open the Google Home app on your phone or tablet, find your Chromecast device in the list, tap the settings icon (three vertical dots), scroll down and tap "Forget device," then confirm. The Chromecast will reset to factory settings and drop off your network. If you want to use it again later, you'll need to set it up fresh through the Google Home app.

The process takes about two minutes and doesn't require you to touch the device itself. Your Chromecast will no longer appear in the app, and other people on your WiFi won't be able to cast to it anymore.

Key Takeaways

  • Open Google Home, find your Chromecast, tap the three-dot menu, and select "Forget device" to disconnect it permanently.
  • Forgetting a device erases all settings and returns it to factory condition, so you'll need to set it up again if you want to use it later.
  • You can also unplug the Chromecast from power if you just want to stop it from working temporarily without erasing its settings.
  • If you're selling or giving away your Chromecast, forgetting it ensures the new owner starts with a clean device.

Using the Google Home App to Forget Your Device

The Google Home app is the main control center for all your Chromecast devices. Open the app on your phone or tablet and look at the home screen — you should see a grid of device tiles, each one showing a Chromecast or other Google device you own. Find the Chromecast you want to disconnect and tap it once to open its details page.

At the top right of the device details page, you'll see three vertical dots stacked on top of each other (called a "more options" menu). Tap that icon to open a dropdown menu with several choices. Scroll down until you see "Forget device" — this is the option that disconnects and resets your Chromecast. Tap it, and the app will ask you to confirm. Select "Forget" again when prompted, and the process is complete.

Your Chromecast will when ready disconnect from your WiFi network and erase all its settings. It will no longer show up in your Google Home app or respond to casting commands from your other devices.

What Happens When You Forget a Device

Forgetting a Chromecast does two things: it removes the device from your Google Home app, and it resets the Chromecast itself to its original factory settings. This means any WiFi passwords, custom names, or preferences you set up are erased. The device will be blank and ready for someone else to set up, or for you to set up again later if you change your mind.

This is different from straightforward unplugging the device. If you unplug a Chromecast, it stops working when ready, but its settings stay saved in the device's memory. When you plug it back in, it will reconnect to the same WiFi network and work exactly as before. Forgetting the device is a permanent break until you set it up again.

Unplugging Your Chromecast as a Temporary Option

If you want to stop using your Chromecast for a while but don't want to erase its settings, straightforward unplug it from the power outlet. The device will turn off and won't respond to any casting commands. It will still appear in your Google Home app, but it will show as offline or unavailable.

When you plug it back in later, it will reconnect to your WiFi network automatically (assuming your WiFi password hasn't changed) and work exactly as it did before. This is useful if you're taking a break from using the device, moving it to a different room, or troubleshooting a problem. You don't lose any settings or have to set it up again.

Removing a Chromecast Before Selling or Giving It Away

If you're selling your Chromecast or giving it to someone else, always forget the device through the Google Home app before handing it over. This ensures the new owner receives a completely clean device with no trace of your WiFi network, Google account, or personal settings. It's the same security step you'd take before selling any connected device.

After you forget the device, the new owner can open their own Google Home app and set up the Chromecast on their WiFi network. They won't see any of your previous settings or have access to your network. If you forget to do this step, the device will still work for them, but they may see your network name in the setup process, which is unnecessary.

Troubleshooting If the Forget Option Doesn't Work

If you tap "Forget device" and nothing happens, or if the option doesn't appear in your menu, try closing the Google Home app completely and opening it again. Sometimes the app needs to refresh to show all options. Make sure you're tapping the three-dot menu on the device details page itself, not on the device tile from the home screen — the home screen menu has different options.

If the problem continues, check that you're signed into Google Home with the same Google account that set up the Chromecast. You can only forget a device if you're the account owner. If you're using a different account, you may not see the forget option. As a last resort, you can unplug the Chromecast and plug it back in while holding down the reset button (usually on the back or bottom of the device) for about 15 seconds until the light blinks. This performs a factory reset without using the app, though it's rarely necessary.

Frequently Asked Questions

Will forgetting my Chromecast delete anything from my phone or computer?

No. Forgetting a Chromecast only affects the device itself and removes it from your Google Home app. Your phone, computer, and Google account are not changed in any way. You can still cast to other Chromecast devices or speakers you own.

Can I disconnect a Chromecast that someone else set up?

Only the person who originally set up the Chromecast can forget it through the Google Home app. If you don't have access to that account, you can unplug the device, but you won't be able to fully reset it. Ask the original owner to forget it for you, or perform a manual factory reset by holding the reset button on the device itself.

What if I forget my Chromecast by accident?

You can set it up again when ready using the Google Home app. Plug in the Chromecast, open Google Home, tap the plus icon to add a device, and follow the setup steps. It will work exactly as it did before, though you'll need to re-enter your WiFi password and any custom settings you had.

Does unplugging a Chromecast disconnect it from WiFi?

Yes, unplugging stops it from using WiFi when ready. However, the device remembers your WiFi network and will reconnect automatically when you plug it back in. If you want to permanently disconnect it from your network, use the "Forget device" option in Google Home instead.

Can I disconnect a Chromecast if I don't have the Google Home app?

You need the Google Home app to forget a device through the normal method. If you don't have it, read it from the Google Play Store (Android) or Apple App Store (iOS), sign in with your Google account, and follow the steps above. Alternatively, you can perform a manual factory reset by holding the reset button on the Chromecast itself for about 15 seconds.