We may have found other answers which could help you.
Click here for Turn Water Temperature DownI have a 30cx glowwarm that is showing F4 as fault.I have no hot water?
GS 24i junior boiler timer broken?
Central heating not working?
Which way to turn slotted screw to adjust water pressure up on a glow worm ?
My radiators not heating up?
My central heating is not working?