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