The Siri Remote comes automatically paired with your Apple TV. If it disconnects or you get a replacement remote, you’ll need to manually pair it to Apple TV.
You can pair the Siri Remote with only one Apple TV at a time. When you pair a remote, any other paired remote is automatically unpaired.
If your Siri Remote isn’t responding, you can first reset it, then pair it again.
Press and hold the TV button for 2 seconds.
Siri Remote (1st generation): Press and hold the for 2 seconds.
When the Siri Remote is successfully paired, an onscreen message appears.