We may have found other answers which could help you.
Click here for Boiler Central Heating Plumber
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 ?
How to fix glow worm 18 hxi ?
Central heating not working?
Glow worm flexicom 30cx auto air vent - how do I replace?