Last summer I had a new Carrier Weathermaker furnace and central air system
installed. This summer, every time the air conditioner is on, white fuzzy
mold forms in a line on the basement floor along the edges of two sides of
the furnace. This didn't happen last summer and never happened around the
old furnace. I keep scrubbing it off and spraying with lysol, but it keeps
coming back. I ran a dehumidifier for a couple of days but that didn't help
either. Any ideas what could be causing this?