While you wait for answers, we may have found some information which could help you.
Success
Message
I have moved into a flat am dissabled carnt get heating on unit flashing F1?
Central heating not working?
How to fix glow worm 18 hxi ?
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?
fitting thermostat?
GS 24i junior boiler timer broken?
BMU error code?
My radiators not heating up?
My central heating is not working?
Home heating systems?
Which way to turn slotted screw to adjust water pressure up on a glow worm ?