ecobee3 lite shared users or family members cannot control it

The checks in more detail

Each way of sharing has its own steps and limits, and the commonest trouble is that a person was invited in one place and expects it to work in another. To share the thermostat in the ecobee app itself, open the app's settings and look for the option to share access or add a user, then invite the person by their email address; they accept the invitation, create their own ecobee account if they have none and then see the thermostat. Each person uses their own login, which keeps changes traceable, and you can remove access at any time.

If the invitation does not arrive, check the spelling and the spam folder, and resend it. If the person sees an old home or nothing, they may be signed in to a different account, so check which email they used. To share through a platform, use that platform's own method. In Apple Home, invite people to your Home from the Home app, which gives them control of the thermostat through HomeKit, and they must use an Apple Account and an iPhone, iPad or Mac.

In Google Home or Alexa, the thermostat is linked to one account, and other family members use their own app with the same home, or a household feature of the platform. Remember that geofencing, which uses phones to detect who is home, applies to the people added in the ecobee app, so if you want occupancy automations, add each person there. If a shared user cannot make changes, check their permission level. If the thermostat shows as offline for everyone, check the Wi-Fi and the power rather than the sharing. Contact ecobee with the serial number if invitations repeatedly fail.