David Combs wrote:
Several years now, the thermocouple on the boiler has
crapped out on only the COLDEST day (thus far) of the year.

Again this year too -- this morning, pilot was out,
and it wouldn't relight. And temp outside was 17(F)!

(Window in boiler-room is open a few inches, due to
air-flow problem -- we have a fan in the pipe that goes
up the chimney.)

Now, in the past, replacing the thermocouple (plumber did the work)
would fix it.


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Question: just wondering -- any substance to this
apparent correlation between
super-cold temperature and crap-out of thermouple?

question: would placing electric heater near the boiler
possibly help?

Thanks!

David


Hi,
Tried to clean the contact(where the thermocouple connects to main gas
valve) and tighten it? Tried to adjust pilot flame size?
Tony