When error E04 is shown the connection to our tado° Servers failed. When this is the case, do the following:
Check whether other devices can connect to the Internet using the same Wi-Fi network as your Smart AC Control. If this is not the case, please reset your Wi-Fi network.
If other devices can connect to the Internet using the same Wi-Fi network, give the Smart AC Control a few minutes to connect.
If none of the above resolves the problem, please contact us.
Tip: You can always control your AC directly on the Smart AC Control even when the internet connection is temporarily unavailable.You can also use your old AC remote for this.