If the leak is originating at the BLOWER HOUSING (5835ED2002D
)---twist the round vent cap on the other side of the door---counterclockwise and remove.
Add silicone sealant to the round/black gasket and re-install.
If the leak occurs at the joint where the DUCT (5232DD2001A
) attaches to the Blower Housing---pull off the Duct from the Blower Housing and add silicone sealant to the "lip" on the Duct and re-install.
If the leak is at the outlet (bottom) of the Duct Tube---replace the Blower Housing Assy (5835ED2002D