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Old 10-16-2007, 07:33 AM   #1
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Water on bottom of furnace


Hi everyone,

I went down to change my furnace filter yesterday and there was a pool of water about one inch deep on the furnace floor. It looked like it might have been as high as 4" based on the water line left on the sides of the insulation on the walls. There is no drain on the floor of the furnace for the water to drain out of. The air conditioner worked great all summer. Does anyone have any idea what is causing this. The furnace is about 20 years old.

Thanks in advance,

Tim
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Old 10-16-2007, 08:21 AM   #2
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Water on bottom of furnace


Condensate drain is probably plugged. All that humidity that it pulled out of the air during the summer has to go somewhere.
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Old 10-16-2007, 09:42 AM   #3
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Water on bottom of furnace


Thanks for your response. There is a pvc pipe that comes out of the furnace and leads to a drain on the basement floor, but it is about a foot and a half up on the furnace. Is this the drain you are referring to?
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Old 10-16-2007, 09:57 AM   #4
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Water on bottom of furnace


Are you talking about the airhandler or the furnace. The furnace is 20 years old so I'm guessing it's not one of the direct vent models, so it's probably not condensate from the combustion.
I'm thinking the pipe that is directed toward the drain in the airhandler. I can only guess that there is a tray of sorts that directed the water to that pipe and it rusted through.
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Old 10-16-2007, 10:47 AM   #5
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Water on bottom of furnace


I'll have to check the piping this evening. Thanks again for your reply.
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Old 10-17-2007, 08:27 AM   #6
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Water on bottom of furnace


Hi, thanks again for your help. I've attached a few pictures, as I'm not a plumber. Do you see anything unusual. I drained the valve that is in picture one, and water came out of the drain, but only about a thimbles worth.

Photo one is the drain valve.

Photo 2 is what the furnace looks like (Carrier Brand)

Phot0 3 shows where the water was gathered and the calcium deposits on the blower.

Thanks again for your help.
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