We may have found other answers which could help you.
Click here for Combi Radiators Water HelpMy central heating is not working?
Which way to turn slotted screw to adjust water pressure up on a glow worm ?
fitting thermostat?
I have a 30cx glowwarm that is showing F4 as fault.I have no hot water?
GS 24i junior boiler timer broken?
How to fix glow worm 18 hxi ?