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Goodman furnace leaking water

My goodman gas furnace is leaking water at the base of the exhaust pvc piping. can i use regular pvc glue or some type of seal to keep the water from leaking out?

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  • overgel Jan 21, 2009

    ok, thank you. whoever installed it didnt put any primer or glue where the pvc is connected to where the gasket is. thats where the water is leaking from. its leaking from where the pvc meets the gasket

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Yes you can use regular pvc glue. You should use pvc primer before you glue it.

Posted on Jan 21, 2009

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Posted on Jan 02, 2017

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1 Answer

Furnace has water under it, why? Its a Dayton gas furnace.


There are several questions that need to be answered about what type of system you have, but i found this posting that may help:
As your gas furnace runs, is there water leaking at the base? Is the furnace's air filter wet, too?There are a few things that could be happening here. But if you have a high-efficiency furnace, here's the most common cause: a condensation leak.
We'll explain why a furnace creates condensation, and what's causing it to leak out of your furnace.
Note: You'll know if you have a high-efficiency furnace if:
  • The yellow energy guide tag says your furnace's efficiency is 90% or higher AFUE.
  • The vent/flue pipe is white PVC as opposed to metal.
Why a high-efficiency furnace creates condensation
How in the heck does a high efficiency furnace create condensation/water anyway?
It's all about how the furnace extracts heat from combustion gases.
A lower-efficiency furnace extracts some heat from combustion gases and then quickly vents them out the flue pipe.
But a high-efficiency furnace, to extract more heat, has 2 heat exchangers. These allow the furnace to extract heat from the gases for a longer period of time. This causes the combustion gases to cool and then condense.
That condensation then exits out your home through a drain. But if that water is pooling around the furnace, there's a problem preventing it from draining properly.
Causes of a condensation leak around a high-efficiency furnace
  • Clogged condensation tubing
  • Clogged condensation drain
  • Breaks in the condensation line
  • Issues with the condensate pump (if you have one)
You'll need a furnace technician to diagnose which of these is the issue and then fix it.
Other causes of leaking water around a furnace
If you have a conventional, standard-efficiency furnace...then its flue pipe may be incorrectly sized.
If you have a whole-house humidifier connected to the furnace...there may be an issue which is causing the humidifier to leak into your furnace. Your humidifier should be getting annual maintenance from a professional to prevent this.

Dec 13, 2016 | Dayton Heating & Cooling

2 Answers

Why is water coming out of my furnace exhaust pipe?


When natural gas or propane burns, water vapor is given off within the flu gasses so a bit of condensation in, off and around the flu discharge is quite normal. If it is a high efficiency furnace with the pvc flu pipe, they must be pitched properly BACK TO the furnace so the moisture will drain backwards and out a drain tap at the bottom of the riser. That style of furnace will have TWO drains...one up high for the air conditioner coil and one about 16" up from the bottom of the furnace off of the 'condensing coil' that the flue gasses pass through to extract a much greater amount of heat from the burned gas.

Many flu pipes are installed incorrectly which causes water to drip outside instead of back to the furnace and this usually results in huge icicles hanging off of them in the winter and eventually the partial blockage causes the flu's pressure switch to open.

If you have regular galvanized flu pipe, you have less than a 90% high efficiency furnace and the resultant flu gas temperature is much higher with a much greater quantity of water vapor in it. A little condensation is somewhat normal on the top of the flu cap as the hot moisture laden vapor comes in contact with the cold and dry outside air. If the moisture is all over the galvanized flu pipe in the basement, you are possibly venting into an oversized and unlined masonry chimney. IF that's the case, the chimney should really be lined with a flexible liner and properly connected to the furnace and water heater (if gas fired) with the proper connections and configuration.

Mar 25, 2015 | Heating & Cooling

1 Answer

Condensation water drips from top of unit


I WOULD CHECK THAT YOUR PVC PIPING IS SEALED PROPERLY.

Feb 22, 2015 | Goodman Manufacturing GMVC951155DX 95%...

1 Answer

New goodman 80% gas furnace leaking condesation down exhaust vent


it could be condensation. or poor seal at roof. probably the seal at roof. also check the larger copper line is it sealed good? if any spot is not this will cause leaking when in cooling mode. maybe dripping from line onto vent.

Jan 28, 2014 | Goodman Manufacturing Goodman 60,000 btu...

1 Answer

My high efficiency furnace has water (possibly condensation) running down the air intake pvc pipe into the furnace and all over the burner, gas valve, and wiring.


First, check the drainline from the furnace. You have a 90% gas fired furnace. Where 80% furnace has 1 heat exchanger, yours has 2 heat exchangers. And the second heat exchanger will cool the exhaust enough, that it ends up below the dew point, and your furnace outlet/exhaust will condensate. This drain is probably stopped up. Now, I've installed and service many of these systems and I've only seen the piping at the roof you described once. And that was when the roofers replaced the roof, damaged the furnace flue pipe, and tried to repair it themselves. Normally, and this may not apply to yours, we tie in the exhaust/supply lines about 2-3 ft. above the furnace. Then 1 pipe goes through the roof. Thus 1 pipe is a kit that has an inner liner & outer pipe(2 pipes in 1). Now I'm not sure if this is a problem or normal for your system, but it may be worth looking into. You should be able to find it in the installation manual, or call a local parts house that sells your brand, or as your tech. And if it's just your drain, forget all about the piping I mentioned. Hope this helps!

Mar 08, 2017 | Goodman Heating & Cooling

1 Answer

Dont have a book to tell me how to install heat exhaust pvc or tin


most furnaces require 4 inch vent pipe to be installed ... you can use pvc as long as it is rated for the temperature... there should be an obvious hole in the furnace where the enducer draft motor pushes the exhaust... if this is a upflow unit in the closet you will need to connect to the bell housing of the exhaust and start running your pipe up and out side .you will need double wall pipe rated for heat and or rated pvc if installing pvc... once outside make sure if on rood you have a roof jack for pipe to go through and a collar around pipe to keep water from running down and then a cap on pipe ....if it is a horizontal unit done the same way except your already in attic and don't have a as far to go it can run vertical and horizontal try to minimize your 90 degree turns and is best to keep it angled to prevent moisture from buiding up in pipe...

Jan 25, 2011 | Goodman Heating & Cooling

1 Answer

Where is the main overflow pipe on my goodman furnace ac model number A24/10


follow the white pvc drain pipe to it .the over flow is next to the drain pipe.. this should have a cap over it .if your furnance is leaking water the drain is clogg.. use a shop vac to unclogg the drain pipe where it drains at the floor drain

Aug 22, 2010 | Heating & Cooling

1 Answer

Heat not coming on carrier gas pack code 31


code 31 indicates pressure switch did not close or reopened during the heat cycle....1st thing to check is the inducer motor,,this is a small motor that turns a small blower wheel that draws the exhaust gases through the furnace and blows them into the vent pipe....1st locate the inducer assembly,,most easily identified by the small plastic fan blade that cools the inducer motor as it runs..1st turn off tstat and turn off furnace power switch..then turn on furnace switch,then set tstat to heat,set the temp above room temp by 5 degrees...remove the furnace front cover,locate the inducer motor,,if it isnt turning,but is warm or hot after a minute or so,likely the inducer motor is bad..if it isnt turning and isnt warm after 1 minute,then likely the main control board is bad,,not turning the inducer motor when it should,,,,,if the inducer motor is running,,then the pressure switch isnt closing,, could be a bad pressure switch but more likely there is a problem with the venting...some possible problems that would cause the pressure switch not to close in an 80% eff furnace [metal vent pipe] are: [1] a blockage in the vent pipe,base of chimney,dead bird at the furnace where vent connects to furnace or down inside the inducer assy,accessed by removing vent pipe from furnace....if all clear the chimney could be blocked up inside,,is the draft good when vent is removed from base of chimney?..if furnace is a 90%+ type [pvc plastic vent pipe],,then check the intake pipe at the furnace by removing it where it attaches to top of furnace..is the intake clogged with anything?..then check the intake and exhaust pipes outside for blockages,,including ice/frost/snow at the exhaust pipe outlet..

Jan 26, 2009 | Goodman GMS90703BXA Heater

1 Answer

Comfort 92 Gas heater Exhaust


the slope is downwards to furnace.The slope isnt for the moisture it is a rise for the flue gas to go outside.The intake is usually connected to the furnace to use outside air for the combustion but it does not have to be.if it isnt an option to take the pipe apart to glue it all up you can seal the water leaks with silicon.anymore questions hillbuck29@aol.com

Nov 01, 2008 | Carrier 38CKC042 Air Conditioner

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