Floor heating setting - desired temperature

Hot water 43 degrees, no negative experiences so far that it was ever cold when showering/bathing.

45-55° Legionella program provides the prevention.

The following, in the living room the RT is set to level 4. My thermometer which is 50 cm away says 25 degrees. Normally the 5 actuators of the heating circuits controlled by the RT should be closed, right? As far as I know level 4 is about 20 degrees? However, all actuators are open and the flow rate is 1l/min.

Just turn down the RTR and check after 5 minutes if the valves are closed.

Your thermometer is not in the sun and is definitely showing the correct temperature? I have also held quite a few portable ones that each showed something different in the same environment.

Soweit ich weiß ist Stufe 4 ca. 20 Grad?

Depends on the RT controller. Sometimes they are more like guesswork.

Die Stellmotoren sind jedoch alle auf und der Durchfluss liegt bei 1l/min

It could be that something is stuck.

You see, there are plenty of sources of error.

Just turn down the RTR and check after 5 minutes if the valves are closed.

If I set the RT to 3 or so, the motors close, but after 24 hours the floor feels very cold.

If I set the RT back to 4, it is very warm again the next day and the actuators do not close.