Geofencing features in the vSMART app do not activate, and the app may show a warning that location services are disabled or unavailable.

Steps to restore geofencing:

• Enable location: On your smartphone, enable GPS/location services and set them to high accuracy.
• Check app permissions: In the phone's app settings, allow the Vaillant app to access location 'Always' or 'Allow all the time', not just 'While using the app'.
• Disable aggressive battery saving: Exclude the Vaillant app from battery optimization or power‑saving modes that prevent background activity.
• Multi‑user setup: If multiple household members use geofencing, ensure each has the app configured correctly and that the geofence logic (anyone home vs everyone away) is set as desired.

If geofencing still does not work, check for app updates or contact Vaillant support, as this is primarily a software/app issue rather than a thermostat hardware fault.