While you wait for answers, we may have found some information which could help you.
Success
Message
what dose fault f4 mean?
Is it normal that the flame is burning all the time?
sabre 24?
F5 fault ?
I recently repaired a leak on a rad valve, ?
central heating wont turn off?
Clearing a blockage from a heat exchanger?
how can l fix my gas control valve?
Glow.worm ultracom 38 cxi showing f25 faultcode?
My Glow-worm Flexicom 30SX looses pressure 0.0?
what causes the sabre he 25 to come on, on its own?
Glow-worm 40B system top-up and inhibitor issue?