I have installed a single Eve Thermo to try out before deciding to update the entire house, but I can't get the temperature to reach the setpoint. I have the Eve set to 21.5 C but the actual temperature varies between 22.5-23 C with a few short dips to 22 according to the app, and will not go down to 21.5. The 22.5-23 C matches an external temp. sensor, so it shouldn't be a question of changing the offset. The water temperature in the radiator system is not changing much during the day, and the valve feedback shows the Eve is only doing small adjustments. Am I missing something obvious here?

Best regards,
Feb 3, 2021