DIAGNOSIS A solid red LED indicates the eero has no internet connection from its upstream source. A blinking red LED indicates a hardware fault or boot failure.
FIX For solid red, check the Ethernet cable from the modem to your gateway eero. Reseat both ends. Restart your modem, then restart the eero. For blinking red, unplug the eero from power for 30 seconds. Plug it back in. If the blink persists, the unit has likely failed.
IF THAT DIDN'T WORK For solid red, test the Ethernet cable and port. Connect a laptop directly to the modem to confirm internet is live. Try a different cable between the modem and eero. For blinking red, contact eero support. The device requires replacement.
HEADS UP Blinking red is distinct from solid red. Document which it is before troubleshooting. Eero diagnostics in the app under Settings > Troubleshooting > Status will confirm 'Gateway Offline' for solid red.