Does the frost protection function stay active when the thermostat is turned off?
Yes, when the chronothermostat is off and the display shows OFF, the frost protection function remains active. If the room temperature falls below the frost protection temperature, the flame icon will appear together with the word OFF. The default frost protection temperature is fixed at 5°C. (Pages 12, 17)
From the official Finder IB1C91 Bliss Wifi Chrono Thermostat manual, page 12
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