Lower humidity? It does get lower as the temp decreases (no frost either)

I had a 1/4" tube that would get a drop or two of water in it and shut the unit down. I had a conditioned crawl space, so it wasn't "cold".

The line was a tube with the center lowered just a tad. It collected water, and shut off the vacuum.

I inverted the low point to make it a high point where no clogging could occur. No problems in 15 years since!

Not your issue but it may be just as simple. Check the tubes.

In response to this post by Late 80s Hokie

Posted: 01/22/2019 at 1:21PM

Any theories on why my gas forced air furnace was leaking water? -- Late 80s Hokie 01/22/2019 12:54PM

You should see a GI doctor. Forced gas with leakage is never a good sign. ** -- HokieGator 01/22/2019 2:17PM

I think that's condensation, and the higher flow when the unit... -- MP4VT2004 01/22/2019 2:01PM

With no direct water source, it has to be from condensation. ** -- MikeVT85 01/22/2019 1:48PM

Would snow getting blown into exhaust and/or intake pipes do it? -- Late 80s Hokie 01/22/2019 1:54PM

I think the extreme cold had something to do with it. -- HokieSignGuy 01/22/2019 1:03PM

You and jman could be right, but here's why I think it's something else -- Late 80s Hokie 01/22/2019 1:08PM

I think it depends on the cavity the exhaust pipe goes out of.... -- HokieSignGuy 01/22/2019 2:29PM

Lower humidity? It does get lower as the temp decreases (no frost either) -- 48zip 01/22/2019 1:21PM

Is it a high efficiency furnace? Those are (or can be?) condensing type -- jmanatVT 01/22/2019 12:59PM

Lower humidity? It does get lower as the temp decreases (no frost either)

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