We inspected the attic and found that the likely source of the water damage in the ceiling of the master bedroom was the FAU which is mounted in the attic. We recommended two options for mitigation of the mold. One option, to treat the surface areas with and not remove the drywall. The other option was to completely remove the drywall treat the wood structure then replace the drywall with new. The customer opted for surface treatment only. During our inspection it was also discovered that the FAU was not working and had been "blowing" fuses. An inspection of the fan found cellophane plastic in the mechanism which was causing the fan to vibrate while it was spinning and likely the cause of the blown fuse. Recommend running the unit regularly to ensure that the drain pan is working properly to carry condensate away from the unit. We also found that the AMPs coming to the unit were elevated. Not sure what the cause of this was but could also be the cause of the repeated blown fuses. More