While you wait for answers, we may have found some information which could help you.
Click here for Worm Main Light
I have a 30cx glowwarm that is showing F4 as fault.I have no hot water?
GS 24i junior boiler timer broken?
My radiators not heating up?
Glow worm flexicom 30cx auto air vent - how do I replace?
Home heating systems?
My central heating is not working?