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