If you tap the cast icon and your Chromecast or TV isn't shown, it means a setting or network issue is stopping Netflix from finding your device on your Wi-Fi
network.
To fix the problem, follow the steps for your device.
Turn off your device. If your device has a power cable, unplug it.
Make sure your device is completely off, not just in sleep or standby mode.
Leave your device off for 15 seconds.
Turn on your device and try Netflix again.
On your Android phone or tablet, open the Settings app.
Tap Google > Devices & sharing > Cast options.
Turn on Guest mode or Use network information.
Try Netflix again.
From your Android phone or tablet, open the Google Home app.
If you don't have the Google Home app, download it from the Play Store.
From the Home tab, look for your Chromecast in the device list.
If your Chromecast is listed, it's on the same Wi-Fi as your phone or tablet.
If your Chromecast is not listed, it might be using a different Wi-Fi than your phone or tablet. For steps to fix this, go to the Google support site.
Once your Chromecast is on the same Wi-Fi network as your phone or tablet, try Netflix again.
Turn off your device. If your device has a power cable, unplug it.
Make sure your device is completely off, not just in sleep or standby mode.
Leave your device off for 15 seconds.
Turn on your device and try Netflix again.
To allow Netflix to find the Chromecast or TV on your local network:
Open Settings.
In the list, find and tap Netflix.
Make sure the Local Network setting is turned on.
From your iPhone, iPad, or iPod touch, open the Google Home app.
If you don't have the Google Home app, download it from the App Store.
From the Home tab, look for your Chromecast in the device list.
If your Chromecast is listed, it's on the same Wi-Fi as your iPhone, iPad, or iPod touch.
If your Chromecast is not listed, it might be using a different Wi-Fi than your iPhone, iPad, or iPod touch. For steps to fix this, go to the Google support site.
Once your Chromecast is on the same network as your iPhone, iPad, or iPod touch, try Netflix again.