Chromecast won't cast from phone or app

Symptoms

• Cast icon doesn't appear in the app
• Cast icon appears but tapping it does nothing
• Casting starts then disconnects immediately
• Only some apps can cast, others can't

Likely causes

• CommonPhone and Chromecast on different Wi-Fi networksCasting requires both devices on the exact same network, including band (2.4GHz vs 5GHz networks with different names).
• CommonChromecast needs a restartUnplugging clears a stuck casting session.
• PossibleGoogle Home app cache needs clearingThe Home app manages Chromecast setup and can get out of sync.
• PossibleRouter blocking device discoverySome router settings (AP isolation, guest networks) block devices from finding each other.
• Less commonApp-specific casting bugCertain streaming apps occasionally break casting support after an update.

What to do

1. Open the Google Home app and confirm the Chromecast shows as connected and online.
2. Check that your phone's Wi-Fi network name matches the Chromecast's network exactly.
3. Unplug the Chromecast for 30 seconds, plug it back in, and wait for the home screen to reload.
4. Restart your phone's Wi-Fi by toggling it off and on.
5. Clear the cache for the Google Home app and the streaming app you're using.
6. Check your router settings for AP or client isolation and turn it off if enabled.
7. Try casting from a different app to see if the problem is app-specific or device-wide.

When to call a pro

If the Chromecast never appears in the Google Home app at all, it may have failed and needs replacement.

Safety