Thermostat shows E18 and indicates a geofencing/location service error; away/home automation not functioning.

Safety: No electrical work is needed.

• Check phone settings: On your smartphone, ensure location services are enabled and the Bosch app has permission for location access (preferably "Always" or "While Using").
• Account login: Open the Bosch app and confirm you are logged into the same account linked to the thermostat.
• Geofencing settings: In the app, verify that geofencing is enabled and that your home location is correctly set on the map.
• Battery optimization: Disable aggressive battery optimization for the Bosch app so it can run in the background.
• Test with another device: If possible, add a second phone to the geofencing group to see if the issue is device‑specific.