[kwlug-disc] winter and furnace

[Ron Singh]

I had the same issue for almost a decade on a furnace installed back in
'87, 30 yrs later in 2017 it started having the same issue requiring me to
blow though the tubes which fixed it for about a month each heating season.
Condensation messing with the pressure switch(es).

I did that until 2023 when my wife suggested that I was having an
uncomfortable longterm intimate relationship with the furnace and suggested
we get it replaced...New beast is now in place for 2 years+.
Sometimes you just have to say goodbye.

I still have a bunch of Honeywell control units that might be of some use
to somehere here with an older furnace? I likely have a couple of those
bi-metal igniters too, All gratis for anyone  here who can make use of them.

*Ron S.*


On Mon, Feb 9, 2026 at 2:58 PM Mikalai Birukou via kwlug-disc <
kwlug-disc at kwlug.org> wrote:

>
> > 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.
>
>
>
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