While you wait for answers, we may have found some information which could help you.
Click here for Water Pilot Workingradiators hot when water turned on?
Intermittent boilet fails to fire on heating?
water from taps is boiling hot?
Glow-worm micron 60ff boiler niosy ?
Loud clanging/Glow-worm Boiler?
What can I do about a Glow-worm Flexicom 30cx fault code F11?