While you wait for answers, we may have found some information which could help you.
Click here for Will Hot Waterradiators hot when water turned on?
water from taps is boiling hot?
how can i fix my central heating. Glow-worm ultimate?
Intermittent boilet fails to fire on heating?
What can I do about a Glow-worm Flexicom 30cx fault code F11?
Loud clanging/Glow-worm Boiler?