all ok yesterday today as the boiler calls for heat there is no pilot light ,i can hear from bottom right behind the time clock area a gentle continual electrical continual buzzz light a stuck scaleletrics motor and a faint tick tick tick sound as the flue fan ramps up and down. is it the gas solenoid valve stuck? if so how do i change it out and if it isnt what is it and how do i change it fix it regards r skedgell

richard skedgell, December 2010

would have appreciated make model etc. assuming it's a combi ticking probably spark electrode therefore the spark isn't being detected or the pcb is faulty

brian, December 2010