:confused:
I have a vent in an upstairs bedroom that won't stop leaking. The furnace is in the attic almost above the room. The main duct from the plenum leads to the first duct which leads to the room in question. Upon removing the register grill, I sealed all around the "boot". In the attic, I sealed all around the boot with a window/door expandable foam. I used 181A tape & sealed any potentially visual seams around the duct insulation. I added more blown-in insulation around the "boot" vent area. It still leaks. I've been told to wrap the duct in "bubble wrap"... have you ever heard of this and/or do you have any other solutions? The compressor is newly installed, unfortunately, for finanacial reasons the coils were not replaced but have been cleaned.

Thanks,
Mark

I would check the condensate drain for the coil housing. They are notorious trouble makers, prone to plug up. Yours could be partly blocked causing water to run in the duct and out the vent. Look for a PVC pipe coming out of the bottom of the furnace, usually white and about an inch OD. Giving a blast of air down the drain usually clears it. If you don't have an air tank or compressor, try a shop vac on the other end. Likely the clog is before it drops much. Even opening up the housing and poking a wire down it might help.

The new compressor may be producing more condensate that old did and the partly clogged drain can't keep up.