Something's not right here this device gives the temperature as too hot too, although it's less far out than the first one. I'm in someone else's house without the thermometers I have at home but I turned their heating thermostat up and the heating clicked on about 17 degrees, this device makes it 20.8 degrees (which is about what it makes it outside too - I don't think so). Did I just get very unlucky and get another faulty device or is something else going on here?