Can I get sick from mold in my AC?

Author: Efrain Hudson  |  Last update: Saturday, September 27, 2025

Mold that finds a way into your home can cause such symptoms as throat irritation, wheezing, and congestion, according to the Centers for Disease Control and Prevention. Living with a moldy air conditioner "would increase your chances of having a respiratory infection," says Mark Mendell, Ph.

Can mold from an air conditioner make you sick?

Mould in your air conditioner can lead to sickness in a variety of ways, from severe respiratory symptoms like shortness of breath and wheezing to nausea, vomiting, or dizziness.

What are signs of mold sickness?

Although symptoms can vary, the most common symptoms seen in people exposed to mold indoors include:
  • Nasal and sinus congestion.
  • Eye irritation, such as itchy, red, watery eyes.
  • Wheezing and difficulty breathing.
  • Cough.
  • Throat irritation.
  • Skin irritation, such as a rash.
  • Headache.

What are the symptoms of air conditioning sickness?

If you work in an air-conditioned building with poor ventilation, it can raise your risk of “sick building syndrome.” Symptoms include headaches, dry cough, dizziness and nausea, trouble concentrating, fatigue, and sensitivity to odors.

Is it bad to breathe in mold from AC vents?

Finding black mold in your air vents is more than just an annoyance—it can actually be toxic and impact your health every time your HVAC system runs. Mold spores travel through the air, spreading contamination throughout your home, and the longer you wait, the worse the problem gets.

Can your air conditioner make you sick? The signs to look out for

Is the black stuff in my AC mold?

You can also see large patches of mold, so if you spot fuzzy, black, or green-black patches, you know the AC unit has mold. Mold can also be brown, green, white, pink, yellow, or orange, though black is the most common color.

How to detox from mold?

To remove mold from your system, focus on strengthening your detox pathways. This includes taking supplements like glutathione, consuming antioxidant-rich foods, staying hydrated, and supporting gut health with probiotics. For more severe cases, consult a healthcare professional for personalized treatments.

How to get rid of AC sickness?

Schedule regular maintenance to your air conditioner, including a thorough cleaning and filter change at least once every few months. If you are still having issues with your nose and throat, consider some lifestyle changes. Drink more water to keep yourself hydrated and your throat and nasal passages moist.

How do you know if your AC system has moisture?

Ice Build-Up: It's a common sign. If you notice ice forming on the evaporator coil, it could be due to high moisture levels. Unusual Noises: Listen to your refrigeration system. If it's making strange noises, it may have excess moisture.

Can you get legionnaires from air conditioning?

Legionnaires' disease is a lung infection you can get from inhaling droplets of water from things like air conditioning or hot tubs. It's uncommon but it can be very serious.

How long does it take to get sick from mold exposure?

According to the CDC, people usually experience their first symptoms within 2 to 9 hours of their first exposure. On the other hand, some people could go for weeks or months before feeling sick if their exposure is limited enough. This is why it is also important to check damp, dark areas of your home for mold.

How to tell if your house is toxic?

If you suspect your asthma worsens or is more severe than usual, contact your doctor or medical professional.
  1. Bad Smells In The Home. When there's a bad smell in the home, you can tell. ...
  2. Peeling Wallpaper. ...
  3. Spots On The Wall. ...
  4. Bad Allergies Won't Go Away. ...
  5. Visible Mold Growth. ...
  6. Past Water Damage.

What does black mold smell like?

Toxic black mold growth has a more potent and identifiable smell, like the smell of decay, wet soil, or rot. Visually, it may be greenish-black, grayish-black, slimy, or more furry than other forms of mold or mildew.

How common is mold in AC unit?

Is mold in your HVAC system bad for you? Yes and no. But it is a common complaint. This complaint is so common because mold is always present in your buildings and your HVAC system to the extent that it is present in your building's environment.

Can you get sick from sleeping with the air conditioner on?

The cold air produced by the AC can irritate the respiratory tract, causing symptoms such as coughing, wheezing, chest tightness, and shortness of breath. Additionally, AC units can circulate allergens and airborne pollutants if not properly maintained, exacerbating respiratory symptoms for susceptible individuals.

How much does it cost to remove mold from HVAC system?

The cost to remove mold from an HVAC system is $2,000 to $10,000, depending on the system type and whether the mold has spread into the ductwork.

How do I get moisture out of my AC indoor unit?

If the air-conditioner has been in use, it will have moisture and probably also water in it. Before you begin the cleaning process of your AC, it is essential to dry it. Set the air-conditioner on 'Fan Mode' and run it for 30-40 minutes as this will help the moisture evaporate.

What are the symptoms of a bad AC drier?

Below are some signs of a bad car A/C receiver drier.
  • You Detect a Moldy Scent. ...
  • Rattling Sounds. ...
  • Refrigerant Leakage. ...
  • The Filter Drier May be Clogged. ...
  • What Should Be Done to Remedy the Problem?

What happens if moisture gets in an AC system?

Moisture will cause acid to form in the system causing serious damage to the compressor and expansion valve parts. It also deteriorates the insulation of the motor windings in the compressor.

How do I know if my air conditioner is making me sick?

A dirty AC system can lead to many breathing problems. If you have a runny or stuffy nose that develops when you're inside but goes away when you leave, this is a clear indication that your air conditioner's filter is dirty.

Can mold in AC make you sick?

Mold that finds a way into your home can cause such symptoms as throat irritation, wheezing, and congestion, according to the Centers for Disease Control and Prevention. Living with a moldy air conditioner "would increase your chances of having a respiratory infection," says Mark Mendell, Ph.

What sickness does AC cause?

Dry eyes, lethargy, dehydration, dry or itchy skin, headaches, respiratory issues, allergies and asthma, noise pollution, infectious diseases, and indoor pollutants are among the common health concerns associated with prolonged exposure to air conditioning.

How to tell if you are sick from mold?

Signs and symptoms of allergic rhinitis caused by a mold allergy can include:
  1. Sneezing.
  2. Runny or stuffy nose.
  3. Cough and postnasal drip.
  4. Itchy eyes, nose and throat.
  5. Watery eyes.
  6. Dry, scaly skin.

Can mold behind walls make you sick?

It irritates the nose and throat, which can lead to both sneezing and coughing as your body tries to get rid of the irritant. Inhaling mold spores can also trigger coughing in people with allergies or an asthma attack, for those with asthma.

Can your body recover from mold?

Healing from mold toxicity is unique to the individual. In people who are not genetically susceptible to mold, a normal immune system response to spores or mycotoxins will generally help clear the body of the threat. For those who are genetically vulnerable, it's not as simple.

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