While you wait for answers, we may have found some information which could help you.
Click here for Stopped Heating BoilerGlow-worm micron 60ff boiler niosy ?
water from taps is boiling hot?
Intermittent boilet fails to fire on heating?
fitting thermostat?
boiler will not turn off (only manually)glow-worm micron 80ff?
how to find a fault?