Living in Sanibel, FL, means enjoying the beautiful beaches, warm weather, and lush tropical environment. However, the high humidity and frequent rain can create the perfect conditions for mold and mildew growth.

If you’ve noticed a mildew smell coming from your air conditioner and are asking “Why does my AC smell like mildew,” you’re not alone. This common issue can be a nuisance and a health concern.

In this article, we’ll explore the reasons behind that unpleasant odor, the potential health risks, and the steps you can take to eliminate it and prevent it from returning.

What Causes AC to Smell Like Mildew

When your air conditioning system emits a mildew smell, it’s usually due to the growth of mold or mildew within the unit or the ductwork. Mold and mildew thrive in damp, dark environments, making your AC system an ideal breeding ground if it’s not properly maintained.

Here are the primary reasons why you might have AC mildew odor:

High Humidity Levels

Sanibel, FL, is known for its high humidity, especially during the summer months. Humidity levels often exceed 60%, which is the threshold at which mold and mildew can start to grow.

When your AC unit cools your home, it also removes moisture from the air. However, if the humidity is too high, your AC might not be able to remove all the moisture, leading to condensation and the potential growth of mold in your HVAC.

Clogged or Dirty Air Filters

Air filters are designed to trap dust, dirt, and other particles, preventing them from entering the AC system. Over time, these filters can become clogged with debris, reducing airflow and causing moisture to build up inside the unit.

This moisture provides an ideal environment for mold and mildew to grow, resulting in poor indoor air quality and leading to that characteristic musty smell.

Blocked or Leaky Ducts

If your home’s ductwork is blocked or has leaks, it can create areas where moisture accumulates. This stagnant moisture can lead to mold growth. Additionally, if your ducts are not properly sealed, warm, humid air from outside can enter the system, contributing to condensation and mildew growth.

Dirty Evaporator Coils

The evaporator coils in your AC unit are responsible for cooling the air before it is circulated throughout your home. Over time, these coils can become dirty, reducing their efficiency and leading to moisture buildup. This moisture can create a breeding ground for mold and mildew.

Standing Water in the Drain Pan

Your AC unit has a drain pan to collect the condensation that forms during the cooling process. If the drain pan is not draining properly or is clogged, standing water can accumulate. This stagnant water can lead to mold and mildew growth, causing a musty smell.

Health Risks Associated with Mold and Mildew

Mold and mildew in your AC system are not just a nuisance; they can also pose serious health risks. Exposure to mold spores can cause a range of health problems, particularly for individuals with allergies, asthma, or weakened immune systems. Some potential health effects include:

• Allergic Reactions: sneezing, runny or stuffy nose, itchy eyes, etc
• Trigger asthma attacks: wheezing, coughing, and shortness of breath
• Respiratory problems: chronic cough, throat irritation, and lung infections
• Sinus infections: headache, facial pain, and nasal congestion

Given these potential health risks, it’s crucial to address any mold or mildew issues in your AC system promptly.

What to do if AC Smells Like Mildew

If your AC smells like mildew, you are not powerless. You don’t have to live with this smell. Here are several steps you can take to eliminate AC smell and prevent future mold growth:

Clean or Replace Air Filters

Check your air filters and clean or replace them if they are dirty. This simple step can improve airflow and reduce moisture buildup in your AC system.

Inspect and Clean Ductwork

Have a professional inspect your ductwork for any blockages or leaks. Cleaning the ducts and sealing any leaks can help prevent moisture accumulation and mold growth.

Clean Evaporator Coils

Schedule regular maintenance for your AC unit, including cleaning the evaporator coils. Clean coils are more efficient and less likely to cause moisture buildup.

Check the Drain Pan and Drain Line

Ensure that the drain pan and drain line are clear of obstructions and draining properly. If you notice standing water, clean the drain pan and unclog the drain line to prevent mold growth.

Use a Dehumidifier

Consider using a dehumidifier to reduce humidity levels in your home, particularly during the humid summer months. Lower humidity levels can help prevent mold and mildew growth.

Run Your AC Regularly

Running your AC regularly can help prevent moisture buildup. If you leave your home for an extended period, set your thermostat to a higher temperature to keep the AC running and reduce humidity.

Preventing Future AC Mildew Smells

Have your AC system serviced by a professional at least once a year. Regular maintenance can help identify and address potential issues before they become serious problems.

Monitor Humidity Levels

Use a hygrometer to monitor the humidity levels in your home. Aim to keep humidity levels below 60% to prevent mold growth.

Some smart thermostats also come with a humidity gauge that can inform you when your home’s humidity levels are going too high.

Keep Your Home Clean and Dry

Regularly clean and dust your home to reduce the amount of organic material that mold can feed on. Address any leaks or water damage promptly to prevent moisture buildup.

For AC Service in Cape Coral, FL, Contact Florida Cooling Solutions Today

AC mildew odor isn’t pleasant by any means. With HVAC maintenance tips from Florida Cooling Solutions Inc., you can get pricing upfront and no hidden fees. We treat your home like it’s our own, leaving no mess behind.

If you are asking the question, “Why does my AC smell like mildew,” we can help figure that out for you. Contact our team in Sanibel, FL, and get a free estimate and assessment of your cooling system today.