[kwlug-disc] winter and furnace

[Mikalai Birukou]

> There are these little pipes that go between enclosed area in furnace
> and membrane switches to detect presence of pressure difference between
> normal/room and that enclosed area with air/fumes flow.
>
> Other season, there was a burned ash in one of pipes, after burner, I
> suppose.
>
> One more season, I gently blew in and out of pipe into membrane switch
> to hear it flip. It got unstuck, and continued proper operation.
>
> This season, a pipe had a drop of water in it. Surface tension in a
> small radius obvious stopped pressure difference from pushing membrane.
>
> I guess, cleanup includes dusting furnace, and blowing through some
> pipes. :) Noting that three events happened over 15 years.

Better word, little tubes, rubbery tubes few millimeters in diameter. 
Not pipes.