While you wait for answers, we may have found some information which could help you.
Click here for Space Saver Glow Boilerhow can i fix my central heating. Glow-worm ultimate?
water from taps is boiling hot?
Glow-worm 30cxl?
What can I do about a Glow-worm Flexicom 30cx fault code F11?
Home heating systems?
how to find a fault?