If you’re getting a Wi-Fi Signal Lost message on your VisionPRO (TH8320WF or RTH8580WF) thermostat, it probably lost internet connection. Please follow the steps below to remedy the issue.
To reconnect your device to Wi-Fi:
If that doesn’t work, try the steps below:
Resetting Thermostat’s Wi-Fi Settings
Reconnecting Thermostat to Wi-Fi
If you’re still having issues, please call Honeywell Customer Care at 1-855-733-5465.