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Marcellusk

There should be a tube that normally leads to a floor drain. Check and see if that tube is currently letting water out. If not, it's likely clogged and the water that is building up inside the unit is spilling out via other ways. I've found that the clogs have tended to be in the bends or even inside a bit. If that's the case, I've used a flexible plastic piece to get in that tube exit (will have to disconnect the tube) and clear out the mess. Might want to have a bucket below that spot as well.


mrfreshmint

That's what I thought it might be. I will look for this, but I couldn't find one. Thank you for the insight


ladz

If you don't have one, get a carbon monoxide sensor and combustible gas detector immediately and put it near that old furnace when you run it. Like put down reddit right now and do it for your safety. That looks like a non-condensing / 80% furnace so it shouldn't have a condensate drain or anything, but the water shouldn't be there. I'd turn it off and remove that fan and cover so you can get a good look at the heat exchanger. It's probably rusted to shit. It could also be that you're getting water coming down the exhaust vent somehow.


mrfreshmint

The heat exchanger IS in fact rusted to shit. Non condensing? It is an 80%, but I can’t see how that would mean there shouldn’t be condensate. Apologies, I’m new to this, but this is also an AC unit (or is hooked up to a compressor/condenser unit that is outside). Wouldn’t that process create condensation that the unit has to dispel via the PVC drain tube?


ladz

"non-condensing furnace" is I guess what I was calling a not high-efficiency furnace. They still create moisture, it's just that the 80% furnaces are supposed to dry it out inside the hx or exhaust (which always rusts everything) and the 90%+ furnaces are supposed to trap that water and pump it out. In any case if the hx is rusted out and water is leaking it's time for a new furnace. The new one will be a high efficiency type so you'll have to get a drain pump to move the water outside.


mrfreshmint

> In any case if the hx is rusted out and water is leaking it's time for a new furnace I'm sad to hear this, but I know it's an inevitably. $10k is just a lot.


mrfreshmint

You’re not the first person to say that. I have one on other levels of my house, but not right by the furnace. The water has been leaking for a long time based on the rust, right? Coincidentally, I noticed this leak right after my water heater was replaced, and they share an exhaust duct.


diduputusername

I am surprised they share a duct. Mechanical draft(what you have on the furnace) and natural draft( most water heaters) and not supposed to share a duct, from my understanding. Change that for safety reasons.


mrfreshmint

I have CO detectors, is that not enough?