How the heck is it possible Fibaro released the HC half a year ago and it is still not working?????   It is still overheating extremely, for example: Bedroom is set to 17c, on HolidayMode while windows are open. Actual temperature is at 21.1c (measured by the sensor it self). Radiator is still extremely hot. Why?????? HC is able to close the radiator, that's not the issue. HC's are calibrated every Wednesday automatically, no errors.   All HC are overheating in othe