Make sure that the installation has not already been completed using a different iCloud account, e.g. with the iPhone of a friend or family member.
If a friend or family member have already installed the products using their iPhone, they must send you an invitation so that you can share access to the products via the Apple Home app.
Ask your friend or family member to go:
- either into the Home + Control App settings, select ;Guests ; and invite a new user
- or into the Apple Home app setting, select and invite a new user
If this is not the case, and it is the first iCloud account to access the installation, reboot the Wi-Fi and HomeKit settings stored in the thermostat by doing a 5 seconds press on the button on the bottom right corner until you hear a beep (see ;How to reset Apple HomeKit on my Smarther with Netatmo connected thermostat? ;).