I decided it was time to do a little PM on the rear A/C yesterday. Found I was cooling and pulling return from the attic. Luckily, I stuck a roll of foil duct tape in the basement while at the stick house. Looked like they tore the tape from around the duct during install, and the hole where the wiring entered was way too big. I'll seal that baby with some minimum expanding foam soon. Here is a shot of the
wiring and here is the
duct. Notice to the right side of the duct the hole to the attic, and where the wiring enters you can see the hole in the roof truss. If you remove the cover on the A/C for cleaning, you might want to take a look at this.