While you wait for answers, we may have found some information which could help you.
Click here for Boiler Heating Faultloud bang when boiler fires up, fault code F1 if it fails to fire?
Why are my radiators are not heating?
Glow Worm Fuel Saver F not working properly ?
Replacing LP112 Programmer?
why is radiators hot when only water is on..HELP?
Glow worm 45/60 not firing up?