There are no trv's fitted.
The sytem is a single circuit, closed loop system.
No wor has been caried out recently.
I will have to get back with the make of the timer. Hope this helps.
I live in a 4 storey house with a combi boiler in the cellar. On the ground floor there is one radiator in the living room. On the first floor there is a radiator in the bathroom, and 2 further ones in the bedrooms. Finally, in the second floor bedroom, there is one further radiator. All...