While you wait for answers, we may have found some information which could help you.
Success
Message
Central heating not working?
Glow worm flexicom 30cx auto air vent - how do I replace?
Home heating systems?
Which way to turn slotted screw to adjust water pressure up on a glow worm ?
How to fix glow worm 18 hxi ?
I have a 30cx glowwarm that is showing F4 as fault.I have no hot water?
My radiators not heating up?
GS 24i junior boiler timer broken?
fitting thermostat?
My central heating is not working?
I have moved into a flat am dissabled carnt get heating on unit flashing F1?
BMU error code?