While you wait for answers, we may have found some information which could help you.
Click here for Boiler Heating Plumbing
sabre 24?
My Glow-worm Flexicom 30SX looses pressure 0.0?
Glow-worm 40B system top-up and inhibitor issue?
Glow.worm ultracom 38 cxi showing f25 faultcode?
central heating wont turn off?
Clearing a blockage from a heat exchanger?