Yes there is 240 volts ,thats ok.I think it's the solenoid part which may have corroded or burnt out, it's too hard to see with it all connected. I suppose these valves are like dodo's to locate. It's only a pretty simple valve,not multi function,there is no resistance,having tested it.
ANY help in locating one of these old baxi valves would be much appreciated.It connects to a negative,a long green resister
LUCKY HARRY, February 2013