While you wait for answers, we may have found some information which could help you.
Click here for Boiler Home Heating Glowworm
GS 24i junior boiler timer broken?
I have a 30cx glowwarm that is showing F4 as fault.I have no hot water?
fitting thermostat?
My central heating is not working?
My radiators not heating up?
Which way to turn slotted screw to adjust water pressure up on a glow worm ?