While you wait for answers, we may have found some information which could help you.
Success
Message
GS 24i junior boiler timer broken?
My radiators not heating up?
Which way to turn slotted screw to adjust water pressure up on a glow worm ?
BMU error code?
I have a 30cx glowwarm that is showing F4 as fault.I have no hot water?
Home heating systems?
Central heating not working?
How to fix glow worm 18 hxi ?
fitting thermostat?
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?
My central heating is not working?