When your Honeywell smart thermostat fails to find your home Wi-Fi network during setup or after a router change, you should perform a structured troubleshooting sequence to re-establish connectivity. First, verify that your home Wi-Fi network operates on a standard 2.4 GHz frequency band, as most Honeywell models cannot detect or connect to 5 GHz networks. Second, restart your home internet router and modem by unplugging them for thirty seconds and plugging them back in to refresh local IP broadcasting. Third, reboot your Honeywell thermostat by removing its faceplate from the wall mount for one minute and snapping it back into place. Finally, move closer to the unit or check for heavy interference sources. You can verify that the troubleshooting was successful when your Wi-Fi network name appears on the thermostat display screen and connection succeeds.
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