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Old 07-10-2013, 06:10 PM   #16
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Condensation all over floor at furnace


Alls I can say is try to follow the wetness. You could also try pouring a little water in the exhaust pipe from outside. That should go down and out the collar drain but if the tube in the furnace is clogged it could back up and maybe leak out. You could do the same thing for the intake pipe but do this only if it has a drain tube installed in it. If the intake does not have a drain tube any water getting in that way will get dumped right into the furnace.

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Old 07-10-2013, 08:24 PM   #17
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Condensation all over floor at furnace


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Check the hose inside that feeds the cpvc pipe. I had a similar problem with my furnace and turned out I just had to tighten it with a hose clamp where it transitions from rubber to cpvc.
Red Squirrel. how do I access the hose inside that feeds the cpvc pipe. I believe that the lower drain pipe seen on the left side of unit is not draining. I pulled the black rubber hose (seen on outside) that inserts into the cpvc drain. It's not wet at all. After removing the hose, I pushed a soft wire up in there about 5 inches and it seemed to dead end. Help.
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Old 07-11-2013, 10:58 PM   #18
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Condensation all over floor at furnace


I havent worked on too many Carriers lately so i could be wrong but you should be able to remove the black hose from the ventilator/inducer fan housing, there should just be some kind of clamp holding it on the unit.

Once you get it off you have a few options.

1. What i would do when servicing a furnace would be to pull off the hose and try blowing air though it by mouth, might sound gross but when you have a tight schedule it works. You will be able to tell if there is a blockage. An open drain may just bubble a bit. blocked drain will make your cheeks puff out.

2. grab a small compressor and try using it to blow air through to remove a blockage if there is one.

3. remove hose and slowly pour water in hose. If there is a leak you should be able to see it this way.

Now if those three options dont help you I think you can rule out the drain itself. Then you get into inspection your inducer housing, and other components that should be checked by a pro ie. heat exchanger

hope you can figure it out and this helps
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Old 07-12-2013, 06:14 AM   #19
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Condensation all over floor at furnace


Ahrens, he is talking about leakage during cooling operations so if it is like my setup (not a carrier, but similar cat iv vent furnace) there is no water in the furnace collector box and collector box drain tube during a/c operations unless it gets in there from the vent pipe and maybe the intake pipe from condensate inside those pipes or from rain getting in from outside. Although on my model I had to make a condensate drain for the intake pipe as there was not one built in like on the vent pipe. I am not sure from his pics if he has one or not but I do see the drain collar on the vent pipe.

The furnaces like this I have seen the a/c condensate drain takes a separate path that bypasses all that... although they probably share the drain pipe that goes out the house.

That's why I suggested he pour a little water in those pipes from the outside to see if that is the source of his water and not the a/c condensate. Then as you say the little collector box drain tube.. or maybe the collector box gasket... could be the problem.
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Old 07-12-2013, 09:34 AM   #20
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Condensation all over floor at furnace


Down here in the south, we sometimes have a problem with condensate forming inside the heat exchanger during the cooling cycle. Warm Moist air is present in the heat exchanger and condenses when the heat exchanger is cooled during the ac cycle. From what I can tell from the pics and I may be wrong, it looks as if that is what is happening. Check the lower drain tap on the inducer assembly.
Good luck
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Old 07-12-2013, 10:07 AM   #21
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Condensation all over floor at furnace


Interesting and good to know, Patrick. NoVa and MD in the summer are much like the south. Very humid. Outside dew points are typically in the low to mid 70s.

I'll do a test on mine one of these days to see if I get any condensate out of the furnace condensate circuit while the a/c is running. But that might only occur under specific conditions like higher interior humidity, like in the morning after a night where the a/c hasn't run much.
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Old 07-12-2013, 10:11 AM   #22
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Condensation all over floor at furnace


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Check the lower drain tap on the inducer assembly.
Good luck
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Old 07-12-2013, 10:34 AM   #23
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Condensation all over floor at furnace


Raylo, We had an enormous amount of rain last night, as you probably did. There's been no increase in puddled water since the rains started. Here's a pic of the exterior vent/intake pipes. The pipes are exposed inside. The pipe on the right with the extended horizontal piece enters the top of the blower. There's no apparent leak or dripping where the pipes connect to the blower. I don't know how I could pour water into either of these pipes. Any thoughts.

I really believe that the leak is originating from whatever the smaller drain on the left exterior part of the unit drains. It appears to be inside where all the electronics are.

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Old 07-12-2013, 10:35 AM   #24
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Condensation all over floor at furnace


cool. check out my reflection in the glass
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Old 07-12-2013, 04:31 PM   #25
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Condensation all over floor at furnace


Larry, the inducer Biggles mentioned is your furnace induced draft ventilation fan. It's the little fan in the black housing connected to your pvc vent pipe.

Basically since you say the condensate from your A/C coil seems to be draining properly and not leaking we are looking at the furnace condensate system that is separate and normally wouldn't have much water in it now.

I am not familiar with your model so some of this is guesswork.... but I think the black box in the back is the collector that catches water from the HX during furnace ops. There should be a tube or a pipe that connects that to the pipe that goes out of your house. The vent pipe collar and the inducer should be connected to this box or to the drain with tubes so water that gets in those (no matter how) can go out the same drain. Check the tubes for clogs. Also, the collector box probably has a gasket against the back that could be leaking. I've never replaced one of those but I have seen a couple threads here over the years about them. But usually they leak in the winter when the furnace is running.

That's the best I can do... good luck and keep us posted.
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Old 07-12-2013, 06:34 PM   #26
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Condensation all over floor at furnace


This doesn't have anything to do with your leak problem, but the perforated disk in what I'm assuming is your exhaust (if it isn't the exhaust, your venting is terminated wrong, although I'm not 100% sure the horizontal offset is correct) is actually supposed to be on the other end of the intake pipe, where it goes into the burner box. It's purpose is to slow down and diffuse the incoming combustion air. Check you install manual for the proper installation. On larger furnaces (120 mbtuh) only half the disk is used (it's two parts put together).

Good luck with you leak problem, I'd chime in on that too but it appears you're getting good help already.
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Old 07-13-2013, 09:39 AM   #27
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Condensation all over floor at furnace


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Good luck with you leak problem, I'd chime in on that too but it appears you're getting good help already.
Benny, Thanks for noticing the perforated disk issue. Please feel free to chime in on the leak issue. I'm stumped and feel I'm out of options. Thanks.
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Old 07-13-2013, 02:48 PM   #28
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Condensation all over floor at furnace


Larry, if you have read the posts you should understand where all the water and condensate comes from and goes to in your system as well as the potential leak points. Without seeing it in person I'm not sure anyone here can tell you where your leak is actually coming from. Methinks you should call an HVAC service company and have them look at it.
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Old 07-13-2013, 04:05 PM   #29
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Condensation all over floor at furnace


water leaks can be caused by a dozen different scenarios. low on Freon, dirty evap coil, poor airflow, duct work sweating, crack in the drain pan or not sloped properly etc etc etc. may want to call an EXPERIENCED Pro not low cost Lou. if that drip hits the heat exchanger it will damage it and if it hits the circuit board it could blow it and both are VERY expensive to deal with. kinda like a roof leak, usually it starts at one spot and migrates out further down the road,
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Old 07-13-2013, 06:36 PM   #30
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Condensation all over floor at furnace


There's the sources that have been mentioned, but there's also external sources: water pipe leaking in a return space, water splashed from a tub/shower into a supply duct, etc. I've personally witnessed both these examples and it took a bit of detective work to figure it out.

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