Our Ravenheat boiler has given up on CH and HW. There has been an intermittent fault (fault described below) for a few months but after resetting the boiler it would work as normal. It has progresively got worse and now it refuses to work at all. If there is a demand for HW or CH the pump starts and the fan kicks in. After a few seconds the overheat and/or flame failure indicator light comes on. I would like to call an engineer out but was made redundant and have no money! I am a confident and proficient DIYer and if it is a relatively simple problem would like to fix it mysely. Can anyone help?

David, February 2010

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

Had a similar problem with mine last year. Found that it wasn't sparking. Stripped down cleaned ignition probes and adjusted gap slightly checked connections on PCB and hey presto, been fine since. If this doesn't work then look at PCB

Tony T, February 2010

pcb

matt, February 2010