ᐅ How to Tell if the Underfloor Heating Is Operating – ERR Still Without Thermostat Cover

Hello. We have the feeling that the underfloor heating is running in one room of our new build. The room isn’t really hot, but the air feels like it does in winter when the heating is on. The floor is also not as cold as in the other rooms. Our room temperature sensors (RTS) are not installed yet. So far, only the thermostats themselves are fitted, but the covers for adjusting them are still missing. The electrician unfortunately delivered the wrong ones here. I have already turned the controller to the left with a screwdriver. However, I could keep doing this indefinitely. I can’t tell when it reaches zero. If I go too far, it goes back to 6. There has been a slight improvement in the room air quality, but the heating could still be running there. I should be able to check at the manifold boxes whether and in which circuit there is movement, right? But how? All the manifold valves are set to automatic. If the heating is firing, it could actually be heating. I seem to remember that ELCO customer service set the heating to activate only below an outside temperature of 18°C (64°F). Thinking about it, isn’t that quite high for a new build? If the outside temperature is 18°C (64°F) for 1 or 2 days, I shouldn’t really notice anything inside, right? What do you think?