When you turn on your air conditioner on a hot summer day, you expect cool air to flow through the vents. But what happens if you notice black spots on your AC? Black mold is a significant problem that can affect your HVAC system, yet homeowners sometimes overlook the early warning signs.
As leading providers of AC maintenance and repairs in Tallahassee, Florida, our team at Cooper’s Plumbing & Air understands the connection between mold and cooling units. Consult our guide below for more details.
What Is Black Mold?
Black mold is the common name for Stachybotrys chararum, a fungus that grows in indoor environments. It presents as dark green or black specks with a slimy texture. The spores could be inside your home, but they’re generally harmless until they settle in an area with the appropriate conditions for mold colonies to form and spread.
The fungus needs air, humidity, warmth, and food sources to grow. Due to these conditions, you’ll likely find black mold in attics, basements, bathrooms, and kitchens. However, any room with the right conditions can develop a mold problem.
Black mold isn’t any more or less toxic than other varieties in high concentrations, but that doesn’t mean it’s not problematic. Excessive exposure to mold spores of any kind could trigger the following health problems:
- Allergies
- Coughing and wheezing
- Severe respiratory distress
- Headaches
- Skin irritation
How Does Black Mold Grow in an HVAC System?
To understand why your AC has black spots from mold, you should know the basics of air conditioning.
Air conditioners have an indoor unit with an evaporator coil and air handler, and an outdoor unit with a condenser coil and compressor. The indoor components absorb heat and moisture from indoor air. The outdoor unit releases that heat into the air outside.
The indoor portion of your HVAC unit is the most vulnerable to mold growth. The evaporator coil in the air handler draws heat from the air as it passes over it. The cold refrigerant inside the coil and the warmth create condensation.
Unless you routinely remove excess moisture, it can create a damp, dark, and warm environment that mold thrives in. The spores could also settle in air ducts if inadequate insulation or air leaks allow warm air to mix with cool air. The same goes for dirty air filters, which can trap moisture within the debris.
Why Black Mold in Air Conditioners Is Dangerous
You now have a general answer to “Why does my AC have black spots?” You also know the potential dangers of inhaling mold spores. So, why is black mold especially dangerous when it grows in your cooling system?
People with pre-existing conditions and weakened immune systems are at greater risk of complications from mold exposure, but anyone could develop complications. If the spores are inside your air conditioner, they will spread throughout your property whenever your system turns on. This cycle increases not only the risk of mold exposure but also the risk of preventable HVAC issues due to overworked components.
Warning Signs of Mold Spores in Your Air Conditioner
The sooner you recognize the symptoms of black mold growth, the quicker you can arrange for mold removal. Look for the following signs if you have concerns regarding mold after answering the question “Why does my AC have black spots?”
Worsening Allergies
Do your allergies suddenly seem worse when you’re at home? The problem could be mold spores from your air conditioner circulating in your home.
HVAC Issues
Mold in air conditioners can lead to performance issues. If it grows on the filter or coils, they won’t perform their jobs correctly, which can lead to premature damage.
Musty Smells
One of the clearest signs of mold growing somewhere in your cooling system is an unidentifiable musty odor. The smell is usually strongest around the air conditioner or when the equipment is running and indicates a higher-than-usual concentration of mold spores.
Frequent Headaches
With persistent exposure to black mold, headaches could become a daily problem. The pain may go away when you leave home but resume when you return. Headaches caused by mold can start as minor and worsen over time.
Black Dust or Specks Around Air Vents
Do any air vents around your home have black or green flecks around their registers? You may assume the markings are nothing more than dust or dirt. However, if they have a musty odor or unusual texture, you could have a black mold infestation.
Lack of Energy
Another symptom of black mold exposure is a lack of mental or physical energy. Like allergies, unexplained fatigue will worsen indoors due to higher spore concentrations. You may feel unaware of your surroundings or unable to complete physical activities.
Tips To Prevent Mold From Growing in Your Cooling System
By following these tips to reduce the risk of mold growing in your cooling unit, you may no longer have to ask, “Why does my AC have black spots?”
- Encourage steady airflow: Consistent, unrestricted airflow through the air conditioner can prevent excess moisture from accumulating.
- Address water leaks immediately: Never ignore an air conditioner leak, as this can promote mold growth.
- Invest in a dehumidifier: If excess moisture in your home is a problem, install a dehumidifier to lower humidity levels.
- Maintain your HVAC unit: Book annual checkups for your air conditioner from a qualified HVAC technician. They will inspect and clean the unit, ensuring it has unrestricted airflow.
Keep Your Cooling Unit Safe and Functional With Professional Assistance
If you are asking, “Why does my AC have black spots?” the answer may be black mold, which could grow if your AC leaks water. Keep your air conditioner functional and your indoor air quality healthy with professional air conditioning solutions from Cooper’s Plumbing & Air. Our licensed heating and cooling technicians have years of industry knowledge and direct experience resolving air conditioning issues.
From routine cooling system tune-ups to refrigerant leak repairs in Tallahassee, Florida, we do it all at Cooper’s Plumbing & Air. Call us today at (866) 464-7132 to request services.