While you wait for answers, we may have found some information which could help you.
Click here for Boiler Combi Pressure
My radiators not heating up?
Glow worm flexicom 30cx auto air vent - how do I replace?
fitting thermostat?
I have a 30cx glowwarm that is showing F4 as fault.I have no hot water?
I have moved into a flat am dissabled carnt get heating on unit flashing F1?
How to fix glow worm 18 hxi ?