We may have found other answers which could help you.
Click here for Boiler Pressure Explode
My central heating is not working?
Which way to turn slotted screw to adjust water pressure up on a glow worm ?
Central heating not working?
I have a 30cx glowwarm that is showing F4 as fault.I have no hot water?
fitting thermostat?
I have moved into a flat am dissabled carnt get heating on unit flashing F1?