| 1 | initial version |
To set the control temperatures for ZoneHVAC:LowTemperatureRadiant:VariableFlow you need to set are the Heating Control Temperature Schedule Name and Cooling Control Temperature Schedule Name under the ZoneHVAC:LowTemperatureRadiant:VariableFlow:Design object:

You may also need to check the availability schedule for your ZoneHVAC:LowTemperatureRadiant:VariableFlow:

Is there other ZoneHVAC equipment in the zone as well? Depending on the outdoor air temperature, I'd expect to see the interior temperature deterior further with ZoneHVAC equipment being off for multiple days. If you post the IDF file (version 24.1, 24.2 or 25.1), I can take a look at it with EP3
Images generated by importing the RadLoHydrHeatCoolAuto.idf EnergyPlus example file into EP3