this is the timer i have
http://www.heatingcontrolsonline.co.uk/programmers-timeswitches-c-25.html/boiler-integral-timers-c-25_63.html/digital-timer-for-combi-boilers-p-352.html
i have a main combi 30 he with no timer fitted, i bought a timer and wired it in as follows
live and neutral to terminals 1 and 2
the 2 blacks to terminals 3 and 4
and nothing on terminal 5
But the heating is not coming on, i have hot water. i can hear the switch clicking but the heating...