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