In an earlier contribution to this discussion,
Kevin wrote:

I have been having problems over the last couple of months with the
pilot light going out on my Glowworm SpaceSaver 50 Mk II boiler. It
started out happening every now and again and has got gradually worse.
What's happening now is that I can light the pilot light, and the
main burner fires up ok, but when the main burner switches off again
after a few minutes, the pilot light is also extinguished at the same
time. I am probably going to replace the thermocouple but is there
likely to be anything else I should be looking at ?

Thanks.

Can you please clarify what the "after a few minutes" refers to.

Do you mean that the main burner runs for a few minutes and then stops, and
that the pilot goes out at the same time? [I think this is the one you
mean]

Or do you mean that the pilot remains lit for a few minutes after the main
burner stops, and *then* goes out? [I wonder whether others have thought you
mean this]

If the pilot is going out with the main burner, it suggests that it's being
blown out by the draft caused by the main burner shutting down. This could
be because it is not very strong - possibly because its jet is partly
blocked by crud, or because it needs to be adjusted up a bit. [Does it have
its own regulator, to adjust the height of the flame?]

Does the pilot remain lit indefinitely if the main burner isn't running? If
so, it's unlikely to be the thermocouple at fault.
--
Cheers,
Set Square
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