Google Chromecast with Google TV won't connect to wifi: what to do

Chromecast fails to connect to your wifi during setup or keeps dropping the connection.

We could not fully consult the manufacturer's support page for this model; the steps are general and may differ in details.

Most likely causes

usually this

Wrong wifi name or password

Check on your phone which wifi name (SSID) is active and choose the same name in the app.
Type the password exactly, watching for capitals and spaces.
Try connecting your phone to the same wifi with that password to verify it works.
Signal: the app shows 'connected' or the Chromecast appears in Google Home.

usually this

2.4 GHz vs 5 GHz band issue

Some devices work more reliably on 2.4 GHz during setup; check whether your router uses separate names for 2.4 and 5 GHz.
If so, try selecting the 2.4 GHz network in the app or temporarily combine the bands on the router.
Signal: connection is more stable and streaming works without drops.

common

Weak wifi signal or distance from router

Move the Chromecast closer to the router temporarily or place the router in a better position.
Turn off other bandwidth‑heavy devices while setting up.
Signal: wifi strength shown on the TV or in the app improves and the connection holds.

sometimes

Router settings blocking new devices (guest network / MAC filters)

Check your router settings for a guest network and ensure you use the same network as your phone.
Temporarily disable filters like MAC filtering or device limits on the router.
Signal: Chromecast can join the wifi and appears in Google Home.

Factory reset

Warning: a factory reset will erase all settings, linked accounts and wifi info; you must set up the device again in Google Home.

Make sure the Chromecast is powered and the TV is on.
Press and hold the small button on the Chromecast for at least 10 seconds until the LED and TV indicate a reset.
Release the button and wait for the Chromecast to restart and show the welcome screen.
Open Google Home on your phone and set up the Chromecast again as a new device.

Frequently asked

My phone can't find the Chromecast during setup. What should I do?

Make sure your phone is on the same wifi you plan to use, and that Bluetooth and location services are enabled; restart the Google Home app and try again.

Should I use 2.4 GHz or 5 GHz wifi?

If your router uses separate names, try 2.4 GHz first; it can be more reliable during initial setup for some devices.

Will my purchased apps be lost after a reset?

Apps and purchases tied to your Google account remain, but the Chromecast loses all its settings and must be reconfigured.

Chromecast shows offline but TV has picture — why?

Reboot the router and Chromecast, then check in Google Home whether the device still uses the same wifi network.