While you wait for answers, we may have found some information which could help you.
Click here for Central Heating Hot Work
Main Combo Eco Boiler Error Code E133?
How can my boiler be fixed i main Medway 55/54 ?
can I fit this myself or do I need to be gas safe engineer?
Fault on fan or flue?
Can I get the instructions to add more water to boiler pressure is just bel?
My Main 30HE loses pressure over 24 hour period?