It sounds like the ignition lead is split
Can you tell me if it continues to "tick" even when the pilot is lit?
no it stops clicking then pilot goes out and red cutout light comes on
iam the third engineer to go to this job so idont know if they changed it when they did the board or the oxy pilot can we rule out the gas valve
i will change the ignition lead first thing
The gas valve should be fine, even if the main solenoid had gone then the pilot would still stay on
they had already changed the whole control box including ignition lead and thermostatic control and pcb also oxy pilot and interuptor
The only thing I can think of then is that the pilot flame is not big enough to cover the thermocouple tip and the boiler does not know it is lit. Are you able to see if it glows red?
i did think of that so i held blow torch on it but no difference
i found out that pcb is not a glow worm product client told me he got it off internet and he could get his money back.so am going to start again with new board
ok - let me know
it was the gas valve