Vulcan Continental Boiler Not Firing

[John Huckerby]

Last night my Vulcan Continental floor standing boiler stopped working.

The pilot light is on but will not fire. The Randall 4033 timer is old and has been slowing down/stopping.

So, I had resorted to manually advancing it to an ON position which has been fine for about a month.

I have just replaced the timer with a new one and the boiler still fails to fire.

So, I guess that it was nothing to do with the timer.

The whole system is approx 23 years old.

What else could it be?

[John Huckerby]

Managed to get the boiler to fire for CH. Room thermostat was turned down!

But still no hot water.

[John Huckerby]

Turned out to be one of the motorised valves.

But now the thermocouple appears to have gone as the pilot light won't stay lit.