Unfortunately for homeowners black mold also loves air vents where spores are naturally circulated.
Mold in air handler insulation.
Mold is common in environments that have dirt dampness and darkness.
Leaks out of the air handler can also damage surrounding building components such as drywall or insulation.
You could also use an insulating hvac paint they use on ducts.
Wear a respirator and goggles to prevent mold spores from interfering with your breathing or vision.
Simply put add more insulation.
Because of this the most common places you find black mold include walls carpeting insulation furniture and ceilings.
Enough of that moisture was transported to the air handler to saturate the fiberglass insulation.
The outside of ducts more often than inside.
The insulation in air handler in my previous home became covered with mold.
Mix 1 quart of liquid chlorine bleach with 3 quarts of warm water and add 1 3 cup of powdered detergent.
This is typical if you find condensation or microbial growth around the air handler joints connections to ductwork to the plenum.
Mold typically does not grow on metal glass and plastic.
Air conditioner air handler rust condensate leaks wet insulation mold hazards leaks in the air handler can cause rust damage and may invite mold contamination in the ahu or in the hvac system ductwork.
I often find mold on the exterior of air conditioning systems more often than the interior.
Mold spores naturally traveling in the air attach to damp areas then begin to grow.
How to remove mold from an air handler.