Yes, what you should do is look at the honeywell website which will give you loads of info.
If you have a programmable room stat the heating on the time should be on 24/7 the room stat does the job.
If you have 2 room stats you can also/will need to buy another gizmo to stop the boiler cycling on and off continuously. The gizmo (forgotten what its called) will only allow the boiler to cycle so many times in an hour (6 I think not too sure)
There are so many on the market its difficult for anyone on the forum to answer all your questions. The options are huge with new products being developed continually.
HR80UK for eg. is battery powered radiator controller .
HC60ng relay module is wired to the boiler or heating valve in Y or S plan. HC60NG will switch on when it gets a demand from HR80UK.
Why wouldn't you just fit TRV's probably the cheapest option.
So, although "get a heating engineer" may seem a bit harsh, its probably the wisest thing to do due to many variables...... even space in the airing cupboard may be an issue.......