We may have found other answers which could help you.
Click here for Combi Heating Safety
Can I get the instructions to add more water to boiler pressure is just bel?
can I fit this myself or do I need to be gas safe engineer?
How can I fix my Main Combi 30HE boiler?
Main 24 Combie Boiler causing power trip of all power to home?
Main Combo Eco Boiler Error Code E133?
My Main 30HE loses pressure over 24 hour period?