Apple TV remote won't pair

I have an Apple TV (Model 1842) and I lost the remote for it. I got a new remote (Model A2854) but I cannot pair it. The TV keeps saying bring the remote closer but it won't pair.

I moved to a new house, new WIFI, so I am pretty sure the box is not connected to WIFI.

I searched through the forums:

• I removed all other bluetooth devices from the room to avoid interference. It didn't work.
• I tried to connect with my iPhone but the app couldn't find the Apple TV. (most likely because it is not on the same network)
• In the forums, they recommend upgrading the TV OS but I cannot do anything without a remote.
• I tried resetting the remote by pressing the square and - buttons. I also unplugged/plugged Apple TV several times.
• I took it to Apple store, they said there's too much interference with other devices, so they sent me back home to try again.

I am out of ideas. How can I connect my new remote to Apple TV?