Underfloor heating air-water heat pump. House too warm when the sun shines

For that, you first need to have your heating optimally set and balanced. As you can see in the pink forum, you are already working on it. Only then a year without and a year with [Taganhebung]. Then hope that the winters are comparable. Then you can compare the annual performance factor and decide...

Did you set it with or without day adjustment? If it's so unclear whether it helps, I leave it out just to be safe... But I would be interested to know whether it makes sense.

Still experimenting. Is it useful? In any case, I no longer have my daily heating cycle at 2:00 AM... Whether that will help later in winter remains to be seen. In the transitional period, we’ll see.

I currently mostly have an 8 to 12-hour cycle at night, during the day the pump is completely off. I'll try a bit once the thermal balancing is perfect. You should be able to script the Luxtronic for such tinkering.

Wow. Are the cycles that long with you?

I have never been able to track my number of cycles. However, with my DV using flat-plate collectors, pauses of at least 5 minutes are also recommended intermittently (by default every 30 minutes).

At the moment, I mostly have an 8 to 12-hour cycle at night, during the day the pump is completely off. I'll try a bit once the thermal balancing is perfect. One should script Luxtronic for such tinkering

You don't need scripts for that. Simply a positive "night setback" and then set the switching time not at night but during midday. Then Luxtronic raises the return temperature setpoint by the configured kelvins at noon. Additionally, you have to lower the base point of the heating curve to keep the same amount of heat produced over 24 hours. Quite simple, without scripts...