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Mold in Air Conditioner: How to Clean and Prevent It

Connor Manion
Written By Connor Manion
Original Publish Date: Dec 20, 2024, 10:08 AM
Last updated: Feb 26, 2025, 08:29 PM
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cleaning mold in an air conditioner
View all Contents
  • Definition of Mold
  • How to Clean Mold in an Air Conditioner
  • Preparing to Clean Mold
  • Preventing Mold in an Air Conditioner
  • Professional Assistance

If you’ve ever noticed a musty or musty smell when you run your air conditioner, your unit likely has mold growing inside it. Mold in air conditioners can cause serious health problems, including breathing difficulties, headaches, and even skin irritation. Fortunately, you can take steps to clean and prevent mold from growing in your air conditioner.

In this post, we’ll go into detail about how to identify and clean mold from your air conditioner. We’ll also discuss some of the steps you can take to prevent mold from growing in the first place. By following our advice, you can rest assured that your air conditioner will be free of mold and running like new again.

Definition of Mold

Mold is a type of fungus, which is a specialized group of organisms that play an important role in the decomposition and recycling of organic materials. Though molds occur naturally outdoors, they are not desirable indoors due to their potential to cause health problems and structural damage. Additionally, molds thrive in damp and wet environments, so air conditioners provide the perfect environment for mold growth if not routinely maintained. Mold can take on many different colors and shapes (such as green, yellow, brown, or gray spots) and may have a fuzzy texture.

How to Clean Mold in an Air Conditioner

The first step in cleaning mold from an air conditioner is to turn off the power and unplug it from the wall outlet before beginning. Next, use a vacuum with a brush attachment to remove any loose mold particles from vents and any other previously inaccessible areas inside the window air conditioner (such as in between blades). After vacuuming, use a mixture of mild detergent and warm water to clean all surfaces affected by mold. Be sure to rinse with clear water after cleaning. If mold still remains after rinsing with water, use a solution of bleach and water (1 part bleach to 10 parts water). Allow the air conditioner to dry completely before using it again.

Preparing to Clean Mold

Before cleaning molded areas in an air conditioner, it is important for homeowners to ensure they prepare themselves with the right supplies for job completion. This includes access to gloves, a brush or rag for scrubbing, rubber gloves for protection against any chemicals used during cleaning, goggles for eye protection, rags or towels for rinsing off cleaner/bleach solution, a bucket for mixing cleaner/bleach solution, a vacuum with brush attachment, mild detergent such as dish soap or liquid laundry detergent, and bleach or lemon juice (if needed).

Preventing Mold in an Air Conditioner

One of the most important steps a homeowner can take to avoid mold growth is performing regular maintenance on their window air conditioner. In addition to cleaning out filters regularly (at least once every two weeks), indoor humidity levels must be controlled by either using an efficient dehumidifier or reducing moisture-generating activities (such as cooking). Furthermore, one must quickly wipe up any water leaking from the unit if wetness is noticed near the airflow vents or elsewhere on the unit’s surface, as moisture is essential for mold spores’ germination and growth.

Professional Assistance

If you continue to have problems with mold growth even after following these steps or if you feel uncomfortable performing these steps yourself, professional assistance may be necessary. A professional can diagnose the source of the problem more accurately and help you determine if there are ways that you can prevent further mold growth moving forward – such as replacing certain components within your window air conditioner instead of just cleaning them off. Additionally, you can contact your local home inspector for professional assistance, who will have access to specialized equipment that can detect undetectable moisture levels within your walls or ceilings that could lead to future mold growth.

Mold can be an incredibly dangerous presence in an air conditioner, so it’s important to take steps to both clean and prevent it from growing in your unit. By taking the necessary steps to both clean and prevent mold in your air conditioner, you can rest assured that you and your family will enjoy a safe, clean, and healthy living environment.

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Contributors

Connor Manion
Connor Manion
Cleaning Climate Control HVAC
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