Thanks for the reply.
The boiler is a Stelrad Ideal W , the clock a Drayton Ls522 with a drayton room thermostat.
The Stat only clicks or is powered when the clock switches on for the central heating - is that correct ?
I have changed everything I can and wired it as per the...
I've now wired in a new timer ,stat and synchro motor but whilst the timer appears to be working and the stat is powered and clicking , the boiler refuses to answer the call for power from the central heating .
Hot water is fine and working well.
There are two wires for the synchro motor ...
Thnanks to all of you for replying .
The central heating seeme to be erractic when it would come on and sometimes only the radiators upstairs seemed to get really hot ...it would take forever for downstairs to get hot .Because they were erratic I thought I would try changingthe thermostat...
I've changed the room thermostat but the central heating refuses to come on.
There is power to the thermostat but it refuses to click (it has an electronic relay)....the hot water works fine ,the pump is working but I can't get the boiler to respond to the room thermostat so the radiators...