There is a central heating in the building and it is automatic, a technical sensor outside and another one inside (in the central for the heating system) controls the system. The thermostat in the central is prepared for 19-21 degrees Celcius. This is what the Swedish landlords are required by the authorities to provide. That temperature gives the best indoor air and if it is warmer its bad air.
Every autumn and spring with warm days and cold nights it takes a while for the heating system to heat the whole building and this is normal.
Usually it takes a couple of weeks for the heating system to heat the building in uniform temperature (heat). The colder outside the warmer inside.