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I have water pooling in a catch pan under my furnace when AC unit is in operations??? I am getting cold air from the vents... Anyone know what the cause would be??

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This is condensation from your a/c running. This is the secondary catch pan which means the primary drain is clogged with algae and not draining, running into the overflow (what you see).

When they plumbed the main drain they should have left a "T" in the pvc line to allow for servicing it. A lot of people will pour a 1/2 cup of clorox into the line every 3 months or so to keep the algae clear. There is probably something more user-friendly at one of the big box stores.

I have a little air tank that I fill with air and disconnect the line and forcefully blow it out. Problem solved.

Good luck.

Posted on Jun 19, 2009

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