Regarding heating:
I have more than I care for - the thermometer currently reads 24.9 °C. After I turned all three temperature dials way down, I had a look into the thermostat/valve box (photo attached) and saw that
- the four valves controlled by the three temperature dials (bedroom 1, bedroom 2, kitchen, living room; the latter two controlled by a single dial) were appropriately shut
- three further valves (bathroom 1, bathroom 2, corridor) were wide open (top part protruding, red part visible)
- the control cables coming out of those three valves led nowhere, so no wonder the valves were fully open.
The electrician told me that the three open valves should be controlled centrally, as a function of outside temperature. Clearly, they need to be hooked up to the central control unit for that to work.
In the meantime, I simply turned the heating-water supply completely off and am waiting for the apartment to cool down, at which time I'll open the main pipe just enough to arrive at a "normal" temperature.
As to your general question about when everything will be fixed, I was told that they'll start with a great fixing session once everybody has moved in, i.e. not before May.