We may have found other answers which could help you.
Click here for Boiler Circuit Combican I fit this myself or do I need to be gas safe engineer?
Can I get the instructions to add more water to boiler pressure is just bel?
main combi 24he wont stay lit?
How can I reduce the pressure on my boiler?
My Main 30HE loses pressure over 24 hour period?
how to regulate gas?