6.4. Why does the radiator not warm up?

Heating installations are complex systems. If radiators do not warm up, the radiator itself is not the only reason.
There is a need to establish whether it is a personal feeling that the radiator is not warm enough or whether the thermal power of the radiator is not sufficient.

A temperature difference between the upper and lower water channel is normal. Today’s construction method in the transition period flow temperatures is between 35 and 40°C. If a radiator is not able to heat the room according to regulations, the reason can be established by the plumber.