having a problem with a valliant 242e. to begin with, we had central
heating but no hot water. the diaphragm has been changed once a year for
the past 5 years so this time we have changed the diverter valve all
boiler was recharged and worked perfectly for 24 hours.
new problem now is that the boiler will not light. we call for heat, the
pump and fan both start running, the ignition sparks for ten seconds but
no flame. boiler goes into lock out.
the gas solenoid was first thought to be faulty so we changed it but
made no difference. it must surely be a gas problem as the boiler goes
through the ignition sequence but never lights. gas has been purged and
the system has been fully bled of air.
any help would be greatly appreciated!!