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My hvac duct work on one of my central air units has a lot of condensation and causing puddles of water throughout my basement. Do you know what the problem is? The drain lines don't seem to have any leaks. There is condensation at the main supply unit of the HVAC system (gas forced air system). Can anyone help understand what the problem is and how to fix it?

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Could be just not insulated enough is this a new instalation? the humidity is too high around the ducts is their a return air vant close by that you can open? you need to lower the humidity or seal the ducts so it cant get to them dan

Posted on Jul 23, 2008

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Our central AC has severe leaking ( condensation)...what to do ?


Every airconditioner will create condensation that needs to drain. Your condensation is not going where it is supposed to, probably because the drain is plugged. Find the cooling coils (they might be in the basement, but are probably in the attic) they will be right next to the fan. There will be a pan or tray under the coils and there will be some kind of small diameter pipe or hose that should go to a sewer inlet, or might possibly go outside. You might possibly have a small collecting tank with a pump that will be operated by a float switch. Lots of possiblities, but it is likely going to be obvious once you find the drain hose.
Good luck.

Jun 06, 2012 | Heating & Cooling

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I have a Ruud Model UBHC-17J11NFD in my basement. Water is coming from the bottom of unit and pooling onto the basement floor. What should I check first?


Hello, most likely you have a clogged condensate line, in order to clean it you will need a wet/ dry vac and attach it to the outlet of the line and the suction pressure should dislodge the clog. Also, if the unit uses a condensate pump make sure it is working, if its not it can cause water to pour out onto the floor.

Aug 09, 2011 | Ruud UBHC Air Conditioner

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Eddfx24fa2 model # on furnace of central air unit in my basement I am trying to calculate wattage of this central air unit On compressor outside: 220 volts, 60 amps??? Does amps sound correct? amps x...


It is a two ton system. and without doing a heat load Calculation and not knowing the heat load It would not be anything but a guess. But if everything is working properly and the system is clean and with good duct work, than it should be big enough for the size of your house.

Jun 06, 2011 | Airtemp B6Y12F2A Air Conditioner

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We have water coming from the Air Handler in the basement. We put a new condensate pump on, but that has not helped. Any suggestions


you need to let the air handler dry completely, then wrap it in a insulation blanket, and before you do this listen for it sucking air and tape it for a good seal. What is happening as the unit runs it is not sealed correctly and is causing condensation, you can also purchase a condensation pan and position it under the unit with a drain line and it will stop the water from running all over the basement. Hope this helped Tim

Sep 25, 2010 | Ruud UAKA048 Air Conditioner

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I have a 4 ton Ruud HVAC system that is two years old. It is a 13 SEER unit. It is tilted slightly to the front of the evaporator to aid in draining the condensate. Two days ago, my daughter came home...


If the condensate drain is clogged, water will stay in the condensate pan located below the evaporator.
As the water builds it most certinly will be picked up by the blower and travel through the duct work.

Jul 03, 2010 | Ruud UBHC Air Conditioner

1 Answer

While the central air unit is on, water is leaking


Any time you have an HVAC problem the best solution is to call a qualified tech. While many problems (and quite possibly this one) aren't that hard to fix the repair cost if you screw something up can be very high. My disclaimer out of the way, here you go:
the condensate (water) is not draining properly. This is either because your pump (if you have one) isn't working, the drain line is clogged (most likely), the gravity drain has been knocked around and feeds back into the furnace, or something more sinister (crack in the evaporator coil pan, for instance). If you have a pump (you'll see PVC running into it and vinyl tubing running out, make sure it's plugged in and the lines are not clogged or kinked. If you have a gravity drain try disconnecting it and blowing it out and making sure it always runs downhill, even if only a little. Other than that, call the HVAC service guys.
Good Luck

May 26, 2010 | Ruud UBHC Air Conditioner

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Unit in basement leaking around bottom


The drain line coming from the internal drain pan to the pump is clogged, causing overflow of the internal pan. That means the water never reaches the pump, and is simply overflowing into the bottom of the unit/duct.

The drain line and pan need to be cleaned and cleared.

A shop vac is a wonderful tool for such a job.

Sep 23, 2009 | Whirlwind FH-778 Air Conditioner

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Leaking central a/c unit


All central A/C units have a condensate drain line that comes from just under the evaporator in the Main air supply plenum.

You may have a blockage in that drain line and will have to remove the pipe to clear the obstruction. Try flushing the drain pipe with warm water until it flows easily from the top to the end.

You might have a gravity drain that goes into a floor drain or a french drain along the basement walls. The other typical drain installation is a condensate pump that the water drains into and when the float in the tank is lifted, a small pump turns on and pumps the water (condensate) out of the house either thru a drain hose thru the wall, or into a drain in the basement, etc.

Check the entire drain line and anything connected to it for any possible obstructions and/or blockage.

If you have any other questions once you take a look at your installation, just add a comment and I'll check back within a day to provide more info, based on your input.

I hope you found this very helpful and best regards!

Aug 06, 2009 | Whirlwind FH-778 Air Conditioner

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