Hi i have an old 3 storey house, the top floor is practically unused and therefore, I leave the radiators genereally turned off. However when I have guests especially in the cold weather I turn them on again.
The problem I have is that water seems to have drained completely from 1 radiator and almost compltely from the other in the top 2 rooms. Has the water pressure dropped? causing this to happen and can this be remedied by increasing it? OR have I another problem altogether?