On 8 Jan 2005 15:56:03 -0800, wrote:

Central air is on the attic (above 2nd floor), and kitchen is on the
1st floor, and the vent in the kitchen is the one that's dripping, all
other vents are dry.

I taped up the return vent already but doesn't help... what else
should I block off or what should I do?

Thanks,
/Kyle

Assuming that you are not using the ducts during the winter you have
to close ALL of them off. And the one in the kitchen should be filled
with towels before you seal it off, to absorb the water so it doesn't
drip.