To avoid heat loss and unnecessary energy costs, your THERMOSTAT includes the open window function.
This function is activated by default and its purpose is to turn off the thermostat when the temperature of the room in which your THERMOSTAT is installed decrease 3ºC in 15 minutes (this function is configurable in the advanced settings).
The icon will be shown on the display while this function is in operation.
If after 30 minutes the temperature recovers again, the function is deactivated automatically and the thermostat returns to normal mode..
You can also disable the function while it is running by pressing any of the physical buttons on the thermostat.