While you wait for answers, we may have found some information which could help you.
Click here for Boiler Heating Combination Boiler
I have a 30cx glowwarm that is showing F4 as fault.I have no hot water?
GS 24i junior boiler timer broken?
My radiators not heating up?
Home heating systems?
My central heating is not working?
Glow worm flexicom 30cx auto air vent - how do I replace?