Mold in Air Conditioners. Is it Dangerous? How to Fix It?

Mold in Air Conditioners. Is it Dangerous? How to Fix It? 16 Sep

A well-maintained air conditioner will work better and longer. The good news is that there are some things you can do to maintain it properly and prevent mold to grow. If an AC isn’t maintained well, mold can spread inside it and, as a result, spread everywhere in your living space. This can create many health problems, especially for kids, elders, or people who suffer from breathing and respiratory problems.

Why maintain your air conditioner?

Preventive maintenance is essential. It contributes to:

  • optimal performance of your device
  • saving energy – and cost!
  • extended service life
  • healthier air, with bacteria elimination and fungus prevention

In this article, we will go through everything you need to know about mold in AC units, prevent it, and deal with it.

What is Mold?

Mold is a fungus that has the smell of moisture or humidity. Inhaling fungus spores is dangerous for health and can cause multiple problems. Having mold in the air conditioner is a problem because it can quickly multiply there and spread in your house. Mold tends to grow in AC if it is not well-maintained. It is more dangerous because the role of air conditioning is to distribute air through your house and rooms. If it is contaminated, then fungus will be effectively spread out through your place, and you will inhale it even when you sleep.

How to Locate the Mold?

To prevent mold from forming in your AC, make sure your air conditioner has drainage systems. It is best to have them lead to a drain tile in your basement or a utility sink. Ensure your drains are always unclogged and working correctly, if they aren’t, immense flooding might occur.

How to Get Rid of Mold in Air Conditioner

It can be tough to get rid of mold from AC. It is always best to prevent it from spreading too much. If you notice a little bit of mouldiness, wear a goggles face mask, and gloves. You can use a strong household cleaner and a sponge. If the fungus has spread on a carpet or some wood, it is best to replace it, as it won’t be possible to get rid of the mold’s totality.

Common Reasons on Why Mold Grows in Air Conditioners

There are many reasons that cause mold to appear in your house.

  • The main reason is the presence of water and dust. If you have mold in your AC, you may want to check for a water infiltration nearby. In most cases, when the water problem is taken care of, the mouldiness disappears.
  • Another reason why mold can be present is high humidity levels in your home. If you live in a humid or very humid area, then having m in your air conditioner is also high. Make sure to use a dehumidifier to get rid of the fungus or cross that reason off the list.
  • Having too many porous surfaces like wood is also a common reason why mold can be present. If the wood, for example, gets moisture on it, it will generate mold for sure. Make sure to clean all porous surfaces, especially if they are near your AC.

Mold in Air Conditioners. Is it Dangerous? How to Fix It? - Photo 1

Impact on People’s Health

In general, mold inhaled in small quantities is not dangerous for health. However, even small amounts of mold should be taken seriously because they can quickly multiply and cause serious health problems. Here are a few symptoms that most people have because of mold:

  • Eye irritation
  • Nose irritation
  • Runny nose that doesn’t go away with medicine
  • breathing that makes a noise
  • cough
  • worsening of existing asthma
  • chronic fatigue
  • headache

Children, elders, and people who suffer from underlying health issues, especially breathing-related problems, are the most likely to suffer a lot due to mold.

How to Prevent it?

Controlling moisture can be the solution to prevent mold. Unfortunately, AC can generate moisture. Here are a few things to do to control the moisture levels in your AC.

  • First, make sure that your window units fit your windows tightly so that no air, humidity, or rain can enter from the outdoors.
  • Clean your window units and drains regularly to prevent the formation of a food source for mold and its spread in your living space.
  • It is also important not to introduce any moisture to the AC ducts. Always clean your filters with a vacuum cleaner or a dry cloth and never with water.

Some other tips:

  • Use air conditioning in moderation.
  • Avoid large differences between the outside and inside temperatures. A maximum deviation of 8 ° C is desirable.
  • Ensure proper maintenance of any air conditioning system to reduce the risk of microbial contamination.
  • Check that there is no standing water in the AC installations. If your system uses water, replace it regularly.
  • Read the instructions for the use of the air conditioning units used and follow the instructions therein.
  • Replace or clean the filters regularly.
  • Prefer the use of an air conditioner equipped with an air purification system.


It is vital to make sure your family’s health isn’t being compromised by a moldy AC. Air conditioning has many health and wellness benefits, but it is not without risks. To use it wisely and safely, it is better to be well informed. Now you know everything you need about mold in AC and how to deal with it. Make sure you apply the above tips, and if required, don’t hesitate to contact an HVAC company to perform regular cleaning of your air conditioning unit.

Need a Professional HVAC Repair? Smile HVAC is Always Ready to Help!

It is easy to avoid these problems by having your air conditioning unit serviced on a regular basis by a company specializing in air conditioners repair. Give Smile HVAC a call and our experts will be at your place quickly to get the job done perfectly. We are available 24/7 and ensure an honest and reliable service on the same day!