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Old 06-05-2010, 08:36 AM   #1
ARS
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AC Coil dripping - not going to collection pan


The ac coil in my attic air handling unit in dripping down onto the filter flooding the bottom of my box. The condensate is not following the angle mounted coil to the catch pan. Last fall I re-piped the condensate line to ensure proper p-trap per the installation manual. Coil has been cleaned (brushed with shop vac and chemically (spray cleaner from home depot) cleaned.
Any ideas? thanks

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Old 06-05-2010, 01:04 PM   #2
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AC Coil dripping - not going to collection pan


Post pics of coil and drain line.

Did you install a vent after the trap?

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Old 06-05-2010, 02:24 PM   #3
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AC Coil dripping - not going to collection pan


Answer: from a different website

The very first thing I would do is to check to make sure that nothing is causing a loss of airflow in the system. If the filter is clean, make sure that all your air registers are open. If those items are okay, coil cleaning is the next step. If that doesn't do it, you may try stepping up the blower speed one level.

Severe sweating is what happens right before a coil starts icing up, so I am going to include what I normally send to people with icing problems.
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Old 06-05-2010, 02:50 PM   #4
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AC Coil dripping - not going to collection pan


And do any of those things apply to your system.
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Old 06-05-2010, 04:32 PM   #5
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AC Coil dripping - not going to collection pan


If you over tighten the drain fitting you can crack the drain pan
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Old 06-06-2010, 03:14 AM   #6
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AC Coil dripping - not going to collection pan


You mentioned that you sprayed and brushed the coil. But, did you clean the underside of the coil? The way I am reading this post, the coil is above the filter rack, so this must be an upflow furnace?
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Old 06-06-2010, 03:17 AM   #7
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AC Coil dripping - not going to collection pan


How much space is there between the top of the coil and the top of the supply plenium? Air flow could be the issue also.

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