With the change in global climate, America is suffering from the hottest summers yet, and air conditioners are no less than a blessing in such conditions. This luxury in the old days has actually turned into a necessity. Since the use has increased, the need for adequate maintenance has as well. Amongst many evils, there is one issue that may arise in your ac unit the presence of black mold.

The growth of black mold in the ac (Air conditioner) unit is because of its continuous use. A mold is a fungus that emerges in dark, damp areas. But how does it start growing inside the air conditioner vent?

This happens when the drain line of your air conditioner clogs up due to leaves or other debris from the outside, which results in water backing up and leaking inside your AC unit leading to black mold growth in the interior parts.

Signs You Have Black Mold In Your Air Conditioner

It is essential that you have the basic knowledge to detect the presence of mold growth inside your ac unit system. The more time passes undetected, the more chances it has to spread. Here are some distinct signs that mold growth shows:

  • Fragrance changes in the air. You will begin to notice a musk-like smell around the ac unit vents indoors.
  • This odor inside the room is more detectable when the mold inhabited ac unit is running.
  • Always stay on the lookout. You will observe black fungi (mold) patches around the vents, drip pans, or evaporator coils.
  • Since mold negatively impacts health, you will start noticing symptoms like sore throat and irritation in the nose, eyes, or sinus areas when the ac unit is turned on.

Do You Want To Get Rid Of Black Mold in Ac Unit?

We do not encourage you to start cleaning black mold in your Ac unit system since it’s hazardous in nature. However, if you cannot reach out to one just yet, here’s what you can do.

  • Make use of a vacuum on the interior part of the duct exposed on the outside in order to get rid of any dust within reach.
  • After 10-15 minutes, move the grille from the basin, and rinse it with fresh, clean water.
  • Now, let it dry in the air.
  • You can also spray the insides of the duct with water. This will help prevent the spread of dry mold in the form of dust.
  • Do not forget to wipe down every duct surface with soap and water along with drying afterward before reassembling.


The issue of mold growth is not restricted in any way. It can grow in residential, commercial AC units, or even the ones used in offices. Why don’t you contact professionals from Qamar Constructions for help? Dial (832) 766-9246 to connect with us.

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