Since there is no temperature sensor in the room, the device estimates the room temperature, and sometimes, depending on the duct temperature fluctuations, the readings may be wrong. Although it will be fixed automatically over time, if you are having an issue, we suggest you put the device in the eco mode so it will work in sync with the main system, no matter what the room temperature is. Or change the desired temperature so that the device starts working when the main system is working (higher temperature in winter and lower temperature in summertime).