We may have found other answers which could help you.
Click here for Work Despite Running
Pressure problems on rsf 820/20?
Rayburn boiler, erratic function?
Rayburn Driven Central Heating Problem - Upstairs Cold?
what is the problem with my RDJ10RF TRANSMITTER/RECEIVER?
i need to increase the pressure on my highflow 400 electronic rsf boiler?
My oil-fired Rayburn has gone out, recently serviced?