While you wait for answers, we may have found some information which could help you.
Click here for Boiler Heating BurnersMy radiators not heating up?
GS 24i junior boiler timer broken?
I have a 30cx glowwarm that is showing F4 as fault.I have no hot water?
Home heating systems?
Central heating not working?
I have moved into a flat am dissabled carnt get heating on unit flashing F1?