We may have found other answers which could help you.
Click here for Boiler Central Heating Fault
fitting thermostat?
GS 24i junior boiler timer broken?
I have a 30cx glowwarm that is showing F4 as fault.I have no hot water?
My central heating is not working?
Glow worm flexicom 30cx auto air vent - how do I replace?
Central heating not working?