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Lennox furnace (G26-Q3-75-1) 1993 model has a condensate leak from the furnace flue Y trap. Is this the technical name because I am trying to find the part and I want to make sure that I order the right part. It is a black upside down Y that connects to the exhaust flue and has a condensate line. It is an origanial two piece, with a vertical seam and a seal. Do they still sell the two piece part or are the replacement parts now all one piece? What is the standard cost, as I have had a wide range of qoutes for the same part?

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The replacement is white, not a wye, one piece molded rubber (there were several "upgrades" between what you have and now). I have seen where people took them (the old one) apart, cleaned off the old caulk and re-sealed with fresh hi-temp silicone caulk.

Posted on Nov 17, 2009

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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

1 Answer

I have a goodman high efficiency furnace, model gms9/gcs9. I've had several furnace techs look at it scratching thier heads. It won't fire up, the ignitor comes on but won't flame the unit. I...


check to see that your condensate line is not plugged. next check the p-trap where your line goes in. also check your flue abs flue pipe see as it comes out of roof is it open or does it have an elbow coming off of it i usually install with elbow preferably less water goes in the units resevoir hope that helps u

Apr 04, 2012 | Goodman Heating & Cooling

1 Answer

Just replaced pressure switch on intertherm m1mb gas furnace but still codes "pressure switch open"


CHECK FLUE FOR OBSTUCTIONS AS WELL AS COMBUSTION AIR INTAKE FIRST. THEN CHECK TO SEE IF THE FURNACE DRAIN IS OPEN AND NOT CLOGGED [ONLY IF YOUR FURNACE IS A CONDENSATING HIGH EFFICIENCY MODEL, typically the flue pipe will be 2 or 3 inch pvc pipe] over the years more often than not, it is an obstruction or poor drainage which will not prove the pressure switch to allow the burner to ignite. in rare cases the furnace control board could be bad as well.TRY DISCONNECTING FLUE AND COMB. AIR AT FURNACE JUST TO SEE IF FURNACE WILL IGNITE. HOPE THIS HELPS!!!!!!

Oct 20, 2011 | Intertherm P3RA-048K Air Conditioner

1 Answer

How many BYU is a Lennox G40UH (x) series furnace? And can it be vented with PVC? Thanks alot!


The Btu rating for this furnace is 40,000. Since the furnace has a 3 /34" metal flue collar on the top of the unit, you can not use PVC pipe to vent it. Only 90+ efficient gas furnaces can use PVC pipe for venting and the also come equipped with a condensation pump, which yours doesn't.

For more information on your furnace and how it's to be safely installed and vented, here is a link to the installation manual http://www.greenwoodheating.com/products/manuals/gasfurnaces/G40UH.pdf that you can download and print.

Hope this helped answer your questions?

Mar 18, 2011 | Heating & Cooling

1 Answer

I have a Trane 90XL installed in 2001which has been running great for 10 years. Now in very cold temperatures this week there is water seeping from the base of the unit. Water is slightly yellow/green in...


Make sure all of the condensate lines are open. The Hose and traps from the furnace. With the cold weather the Furnace is running alot more and Condensing more water from the Flue Gases.
The Furnace can produce up to 5 Gals of water in an 8 hour period. If the drains are all open then you better get a professional to check out the furnace you could have a cracked secondary Heat exchanger which could be leaking carbon monxide into the house. Do you have a CO2 Detector in the house??

Jan 21, 2011 | Heating & Cooling

1 Answer

Itseems as though the condensation trap on Lennox G26 not working


Hi!
Take of both access covers on your furnace. In the bottom compartment (where the indoor blower fan is) there is a condensate trap, It will be black, gray, or white. Disconnect the rubber tubing that is connected to it (these tubes run up to the collector box in the top compartment. Remove the condensate trap and wash it out until it is clean inside. You will have to shake it some to get all the dirt out of it. Reinstall it and you should be good to go. Hope I was of help to you!! Good Luck!!

Dec 06, 2009 | Heating & Cooling

2 Answers

Lennox furnace 17 yeanrs old. flame comes on and the shuts down sometimes right away some times in a few minutes. We have the furnace go down to 58 at night. It takes all day to get back to 67.


Sounds like a dirty flame sensor.
Also 9 degrees is a large swing to recover. Most specialist will advise no more than a 5 degree set back, otherwise recovery time eliminates any savings you may achieve.

Dec 05, 2009 | Dayton (3E407) Heater

1 Answer

27 year old Lennox gas furnace no heat was coming out of the vents, so I went to the basement and saw 1. One burner was clogged all along the surface and instead of the flames going up the flue, they were...


Please get a furnace that thing is seriously a death waiting to happeng.that is a scary thing to happen. I personally have seen the end results. In the mean time space heaters are safer.

Mar 14, 2009 | Carrier XHB123D X/Y Series Heat/Cool Air...

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