While you wait for answers, we may have found some information which could help you.
Click here for Wire Broken WorkMy oil-fired Rayburn has gone out, recently serviced?
How do I stop my radiators staying cold at the bottom?
how do i bleed a rayburn 480k system?
how can i get radiators hotter?
Has the Pulsacoil system have to be drained to replace the thermosistors?
rwb 200?