How can I fix my Glowworm 70FF boiler?

I would check the motorised valve,if you have 2x2 port valves get somebody to turn programmer on while feeling the valve for the heating after 10-15 secs you should here it click,its the switch in the valve that starts the pump and fires the boiler up.If there is a 3 port valve then the programmer is suspect but i would short out the relevant connections on the connection plate at the back of the clock to prove a point ( but i am an electrician so im confidant with what im doing ) or test in the junction box to see where the fault is

toptrish
January 2015