While you wait for answers, we may have found some information which could help you.
Click here for Central Heating Hot Work
Can I get the instructions to add more water to boiler pressure is just bel?
How can I fix my Main Combi 30HE boiler?
how to regulate gas?
Fault on fan or flue?
My Main 30HE loses pressure over 24 hour period?
Main 24 Combie Boiler causing power trip of all power to home?