ravenheat csi85t intermitting fire up?

The PCB commonly fails often giving one of the following symptoms:
Fuse on PCB blown - boiler does nothing.
Pump runs but fan not running or erratic.
Pump and fan run but gas valve doesn't open (but check air pressure switch).
Pump, fan & gas valve operate but no spark ignition.
Boiler lights but shuts down after a few seconds because it doesn't detect flame (but check electrode leads and condensate trap if conncted).

PCBs are available on Ebay.

Phil T
June 2010

If you look at the book that came with the boiler look on falt finding ( is the burner on/off )It is either the fuse or the gas valve or something you cant do your self. to test the valve I pulled the wire off when it was lit, and it stayed on so that was the fault.

dennis m
January 2010

Think it might be the pcb board, i'll let you know if it cures the fault

paul holdsworth
January 2010

i have exactly the same problem but only in central heating mode, hot water ok

paul holdsworth
January 2010