While you wait for answers, we may have found some information which could help you.
Click here for Problem Boiler Lightsradiators hot when water turned on?
Intermittent boilet fails to fire on heating?
Home heating systems?
What can I do about a Glow-worm Flexicom 30cx fault code F11?
how to find a fault?
Glow-worm micron 60ff boiler niosy ?