You can try a few troubleshooting methods to fix the issue if your Linksys RE6400 range extender keeps disconnecting, as some users have reported.

First, make sure your range extender is positioned inside your primary extender’s ideal range. A weak connection can come from positioning it too far away or in places with thick walls, which can cause disconnections. To see whether the link stability may be improved, try relocating the range extender closer to the extender. Second, see if your Linksys RE6400 setup needs any firmware updates. Visit the Linksys support page, find your model, and download any updates that are offered. It’s also important to take interference from other electronic equipment into account. Baby monitors, microwaves, and cordless phones can all obstruct WiFi signals. To reduce interference, try moving these items away from the extender or range extender. Resetting the range extender to its factory default settings is another troubleshooting procedure. You can accomplish this by holding down the reset button for roughly 10 seconds. After that, use the setup wizard or the Linksys mobile app to reconfigure the extender.