i cannot get the boiler to energise the gas valve.it was perfect before the owners went on holiday,on return switched on to summer mode fan starts(pilot lit and ok),as soon as demand is there,fan stops,pump runs and diverter valve moves freely,but no 240v at gas valve.It will not work on CH either, pump runs normally.
checked voltage at flow switch, 240v red wire in,when switch closes 16.6v on pink wire,could this be the problem.diagnosis chart says there should be 240 at pink wire across PCB neutral.
I suspect its this or diff sensor at top of boiler,although i'm not sure how to check this properly or weather the two operate jointly to create the correct conditions
any help would be appreciated
checked voltage at flow switch, 240v red wire in,when switch closes 16.6v on pink wire,could this be the problem.diagnosis chart says there should be 240 at pink wire across PCB neutral.
I suspect its this or diff sensor at top of boiler,although i'm not sure how to check this properly or weather the two operate jointly to create the correct conditions
any help would be appreciated
