Worcester Heatslave Senior 12 Boiler Problems

[flipflop104]

The pilot light on the above boiler would not stay lit and I have replaced the thermocouple with a HSS-001 Universal Thermocouple length 900mm. The existing one was 600mm. The pilot light still won't stay lit.
I followed the instructions for re-lighting the boiler, i.e. everything switched OFF, electric supply, thermostat controls & timers, but still the pilot light still won't stay lit.
Am I missing something?
I believe the thermocouple is the usual source of the problem when the pilot light won't stay lit.
Any suggestions?

[pilotlight]

Flipflop, As you state, the thermocouple is the usual source
for this problem, but alas, it is not always the case.
It is possible that the thermo-electric valve ( which is incorporated in the actual gas valve ) may have failed.
Suggest you acquire the services of a corgi registered engineer.

Hope this helps.

[lembo121]

Ok.
2 options

1) High limit thermostat faulty!! (not very expensive)
2) Gas valve as pilot says!! (put some overtime in this week)