This is just the notify automation. Can you post the one which sets the temperature?
And this automation confuses me. I see no trigger? And it sets testvar and then sends the value if its after 8:00. But you could just send the {{states('input_number.absenktemperatur') | float }} in the message.
this automation was created for test purposes only.
I have deleted everything “useful” and just want to understand how variables are handled.
The actual goal is to automate my thermostats and assign all {{states('input_number.xxx') | float}} to variables once in the automations and then only use the variables.