Hi,
I have one of the above mentioned boilers and yesterday it decided no longer to be very happy. The 4 diagnostic neon lit (good sign), the pilot lit, but the main burner would not engage (no gas).
I turned it off, fiddled with it, and then it started working again. It was find this morning when I got up, and ok when I got home from work. However about 30 minutes it ago it failed to relight, and is now refusing to work!
I wiggled a few things as before, but no luck. There appears to be clicking from the internal theromstat of for the water heating temperature and the
4th neon flicks on and off.This would suggest a fault with the ignition device, or the multifunctional control.
Anyone got any ideas? I am not too keen at fiddling with the gas pipes though!
Cheers, Matt