We may have found other answers which could help you.
Click here for Work Despite RunningHas the Pulsacoil system have to be drained to replace the thermosistors?
how can i get radiators hotter?
i have fitted a second hand rayburn and can't get radiators to work?
Rayburn Driven Central Heating Problem - Upstairs Cold?
rwb 200?
How do I stop my radiators staying cold at the bottom?