The VESTA THERMOSTAT has a smart function that prevents possible freezes in the heating circuit.
This function is activated automatically if it is enabled on the device, working when the temperature drops below 5 °C and the thermostat is turned off.
The boiler will operate until it reaches 8 °C and then it will turn off again, avoiding the circuit being damaged and the water that is inside it freezing.
This feature can be adjusted, enabled and disabled from the advanced settings of the thermostat.