How do you get rid of mold in AC coils?

Asked By: Mahamadu Nixon | Last Updated: 16th January, 2020
Category: home and garden indoor environmental quality
4.8/5 (93 Views . 34 Votes)
Tips on How to Clean Mold & Mildew From HVAC Coils
  1. Make sure you clean coils at least once a year, twice if you are also using your HVAC system for heating.
  2. If possible, vacuum the coils gently or use a soft brush.
  3. Wet clean the coils with an alkaline coil cleaner and pressurized water.

Click to see full answer


Regarding this, does AC coil cleaner kill mold?

While U.V. lights do help kill mold and other living organisms in an HVAC system, mold is a symptom of a problem not the problem itself. The first step is to clean the mold growth off of the evaporator coil. Most of the time coils can be cleaned in place using a no-rinse evaporator coil cleaner.

Also, what causes mold on AC coils? Mold and mildew thrive in wet, dark environments. When an air conditioner is in use, condensation often forms on the unit's evaporator coils. This moisture from condensation creates the ideal environment for mold and mildew to grow.

Herein, is mold in AC unit dangerous?

Mold and other indoor air pollutants that hide in air conditioners can cause allergic reactions and even respiratory disorders. Any mold in your home is dangerous, but mold spores in the air are dangerously easy to inhale, especially for young children and elderly people.

What can I spray on my AC coils?

In place of a commercial cleaner, you can use a mild detergent and warm water to clean the coils. Mix warm water and a simple detergent in a spray bottle, hand sprayer or garden sprayer. Apply the water and detergent solution to the evaporator coils.

29 Related Question Answers Found

What do I do if my air conditioner has mold?

Wipe any visible mold growth. In a bucket, mix ½ cup bleach, 1 tablespoon mild dish soap, and 3 gallons hot water. Use a cloth, brush, or sponge to soak up the solution. Scrub the moldy areas of your air conditioner well, and clean the air conditioner front grille if it's moldy.

How can you tell if your air conditioner has mold?

How to Tell if You Have Mold in Your Air Vents
  1. Follow your nose. The first sign you'll probably notice if you have mold or fungus growing in your air vents is the telltale smell.
  2. Check for visual signs.
  3. Check for standing water or excessive moisture.
  4. Get your vents tested by a professional.

How often should AC coil be cleaned?

To minimize energy usage and reduce utility costs, the A/C coils should be cleaned at least once a year. It is estimated that dirty evaporator and condenser coils can increase the energy usage of your air conditioning system by over 30 percent.

Can you spray bleach on AC coils?

I always spray the coils with a mixture of bleach and water using a garden sprayer to help inhibit mold growth. About 1/2 to 1 cup of bleach to a gallon of water works very well. Never use acid based chemicals to clean your coils! Dust and dirt build-up on the inside of the coils.

How do I prevent mold in my air conditioner?


How to Prevent Mold in HVAC Systems
  1. Maintain the drain pans. If the drain pans are not sloped and cleaned regularly, standing water won't be able to drain through the deep seal trap and will accumulate in the drain pans.
  2. Replace air filters regularly.
  3. Apply an HVAC mold inhibitor.
  4. Use a disinfectant.
  5. Keep ducts dry.
  6. Check the air intakes.

What is the best AC coil cleaner?

Best Air Conditioner Coil Cleaners on the Market Today
  1. Nu-Calgon 4291-08 Nu-Brite.
  2. ComStar 90-100 Coil King Alkaline External Condenser Coil Cleaner.
  3. Nu-Calgon 4171-75 Evap Foam No Rinse Evaporator Coil Cleaner.
  4. AC-Safe Foam Coil Cleaner.
  5. CRC Foaming Coil Cleaner.

Can mold in AC make you sick?

Air Conditioner Mold Can Make You Seriously Sick. As the temperature and humidity levels fluctuate, so does your risk of contamination from mold and disease-causing bacteria, including legionella bacteria that causes Legionnaire's disease.

What kills mold in air conditioner?

Fill a plastic bucket with a few gallons of hot water and about 1/2 cup of household bleach. Saturate a scrubbing sponge in the bleach solution and use it to wipe the inside surfaces of the AC unit, removing all traces of visible mold. The bleach will kill residual mold spores.

Can you clean mold out of an air conditioner?

Wipe away any visible mold growth. In your bucket, mix a solution of ½ cup bleach, 1 tablespoon mild dish soap, and 3 gallons hot water. Using a cloth, brush, or sponge, soak up the solution and scrub the moldy areas of your air conditioner well. Also, clean the air conditioner front grille if it has mold on it.

Does bleach kill black mold?


Killing Black Mold with Bleach on a hard, non-porous surface will kill nearly any type of mold spore(s) that it comes in contact with. Eliminating Black Mold with Bleach is also very inexpensive and readily available.

What is the difference between mold and mildew?

Mildew is typically white, gray or yellow and grows on the surface of moist, warm areas. Its texture is fluffy or powdery. On the other hand, mold tends to be green or black, and it usually grows underneath the surface of anything that has gotten wet. Its texture can be fuzzy or slimy.

What kind of mold grows in air conditioners?

Mucor is one of the most commonly occurring types of mold that is found in air conditioners and air vents and is something that needs to be treated at the earliest because of the potential threat that it holds.

What is the black stuff coming out of my air conditioner?

When a wax candle or wood in your fireplace burns, it produces tiny black soot particles. So if you're seeing black particles coming out of your air conditioner vents and you're a fan of burning candles or your fireplace, the most likely culprit is soot.

Can I spray Lysol in my AC unit?

There should be no problem using Lysol for a light mildew problem in your air handler, but it's recommended to clean your evaporator coil with a product specifically for that first and then you use the Lysol to slow down the mildew from growing back.

Does homeowners insurance cover mold removal?


Basic home owner insurance policy excludes the coverage of damage caused by mold growth. Some policies will cover damages if it can be associated to an actual loss that was covered and the mold is a result of that loss (for example – a big water damage causing mold).

Does sunlight kill mold and mildew?

Mold: FacemaskRapidly moving air will dry out the moisture and desiccate the mold spores, rendering them inactive. If necessary, take the books outdoors and place in the sun and a mild breeze for a short time, and if possible, remove the mold outdoors. Ultraviolet rays from the sun will kill mold.

Can I use vinegar to clean AC coils?

Take your spray bottle, vinegar and water. Mix ½ water and ½ vinegar inside the bottle. Shake the solution well, and apply it to the evaporator coil and condenser coil. Vinegar will not harm the parts and is a very effective cleaner.