Our house is old, and the AC system is, too. Last summer we had several brown spots show up on our bedroom ceiling below where the air ducts run. Research led me to believe that that the air ducts were "sweating" condensation. We didn't find any leaks. We just painted over the spots.
It's happened again this year. In one place, it's molded a little bit. In the other, it's a totally different room and I have no idea if there's attic over that area or if we could get to the air duct.
It it safe to just spray bleach on the mold and paint over the spots? Is there an (extremely) affordable way to prevent this from happening? Should I be worrying that mold is growing between the walls in places I can't see??
Re: "Sweating" Air Ducts?