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