There are several places throughout your home or business that mold is likely to hide. These areas are the first places that you should check if you suspect mold may be present. Places to Check for Mold: *Air Vents. *Kitchen. *Bathrooms. *Washer/Dryer Areas. *Water Heater/Furnace. *Ceilings. Look underneath sinks and appliances for signs of mold. The discovery of visible mold often indicates a much deeper problem.