How To Reduce The Chance Of Getting Mold From Your AC

Aside from unwelcome pests, one of the major issues homeowners face is the growth of unwanted fungi such as mold. Although they’re part of nature and actually play a significant role in the decomposition of organic matter, you don’t want them inside your abode.

However, mold can get into your home through tiny spores that float in the air. You can avoid infestation, though, when you ensure that your indoor spaces are free from humidity or moisture. This is because all types of molds need water to grow. In particular, they thrive on wet surfaces. (1)

Your AC might have mold

You don’t want molds anywhere near the people in your household because they can cause allergic reactions, from itchy skin and stuffy nose to more intense breathing difficulties. Studies have shown that exposure to mold at an early age may cause children to develop asthma, especially if they’re already genetically susceptible to the condition. (2)

One of the places to look for mold in your home is in your air conditioner (AC). It provides the ultimate breeding ground for the fungus, since it produces and retains moisture.

If you notice that you already have a major mold problem, it’s time to contact cleaning service providers such as Rescue Clean 911, to nip the issue in the bud. Once you’re sure that the initial issue has been addressed, you should do all that you can to avoid future fungal growth. Here are some ways you can do on your end: 

  • Clean your AC regularly

When you maintain your AC regularly, not only are you ensuring that it functions optimally, but you’ll also be aware of early signs of problems. Machines that aren’t cleaned for months can produce ice on the filters, especially if they don’t have a non-frost feature. 

Then, once the AC isn’t in use, the ice would melt and pool on the appliance itself or drip to the floor. In turn, this can become an inviting breeding ground for mold spores in the air. These are the parts of the AC that you should make sure to clean regularly:

  • Drain pans – Inspect the drain pans and make sure that there isn’t any fungal growth in them. Check that the pans are sloped as well so water would drain through the seal trap and there won’t be any stagnant water.
  • Air filters – One of the primary functions of air filters is to catch mold spores and other contaminants. Clean these regularly or, if they’re past redemption, you should replace them.
  • Ducts – Going through your AC’s ducts may be much work, especially if you have an industrial-sized system. Nonetheless, make sure they’re dry and free of moisture or, worse, mold isn’t present in them. Fortunately, you can easily find companies that provide mold remediation services. Check out to learn more.
  • Ensure window units fit snugly

If you have a window-type AC, you should make sure that the frame’s measurements are precise for your unit. Suppose the hole in your wall is too big—you’re giving rain and humidity a chance to get inside the room, which can bring about mold spores. If you already have a frame that’s too big for your AC, you should make sure to seal any gaps to avoid mold problems.

  • Check your drainage system

For whole-house AC units, you should make it a priority to have a proper drainage system. You have the option to have it led to a drain tile, basement slab, or utility sink. You must make sure that it doesn’t allow moisture to pool around the unit or seep into the ducts. Check for clogging as well, since this increases the risk of flooding.

  • Repair water leaks

As mentioned before, when you clean your AC regularly, it can be easy to spot leaking and other similar problems. However, you should also fix water outflows in other parts of your home such as from leaking pipes and on the roof.

These may seem unrelated to your AC unit, but they can create a favorable environment for mold to grow. Then, the infestation may become more pronounced and affect your cooling system.


You don’t want mold to grow in any part of your home, since the fungus can affect you and your family’s health. It can easily infiltrate your house, though, since tiny spores are carried through the air and breed on wet surfaces. Cleaning your AC units regularly, ensuring that the frames fit snugly for window units, inspecting your drainage systems, and fixing water leaks are some things you could do to avoid infestation and live worry-free in your abode. 


  1. “A Brief Guide to Mold, Moisture and Your Home,” Source: 
  2. “Basic Facts about Mold and Dampness,” Source:

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