I am an engineer working on a RSF84. What is happening is when the central heating comes on the boiler starts up walms up or 5 minutes shuts down fan r-cycles has if to start up but then goes to flame failure. But if you switch off the power supply and turn back on again, it will start up and then same again 5 minutes the flame failure I have proved the pressure switch changed the thermistors both d.h.w and c/h proved the overheat state by bridging.
RAVENHEAT boilers
- Thread starter orbit
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ahh what you need is the registered heating engineers forum (try ARGI)this is the diy bit 
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