Mould in Aircon: How to Prevent it and What to Do if You Have it

Phill Crawley

Smarter Air & Electrical

i 3 Contents

No one likes to find mould in their home, and it can be a horrifying scenario when it starts growing in your air conditioner. Mould only needs three things to start growing moisture, oxygen & organic matter (a source of food) all of which are found in Brisbane air conditioners. Thankfully, there are a few things you can do to prevent mould growth in your AC unit and some steps to take if you find that you already have a mould problem. This article provides some tips on how to deal with mould in your air conditioner and in your home.

Mould in aircon can cause health problems

Mould is a type of fungi that can grow both indoors and outdoors and is commonly found in damp or humid environments which are the ideal conditions for mould to grow. Even 5 years ago, the effect of mould and other fungi was not that well known but we now know that when mould spores are inhaled, they can cause a range of health problems including allergic reactions, lung disease, mould allergies, respiratory infections and chronic illnesses such as asthma and other health risks. In some cases, mould exposure can even lead to death. Therefore, it is essential that mould in aircon evaporator coils is removed as soon as possible to protect your health.

Symptoms of mould in aircon such as blocked nose, sore throat, coughing, wheezing, watery eyes and skin rashes can all indicate that you have aircon mould, you may even notice a musty smell when your air conditioner is running.

If you have a mould infestation in your air conditioner you may notice some of the symptoms:

  • Musty smells, foul mildew smells, stale odours or other unpleasant smells.
  • Black dust or mould marks on the ceiling around your air conditioner grilles or vents.
  • Throat irritation, sinus coughs, nasal congestion and minor respiratory problems.
  • Consistently high humidity levels in the home that your air conditioner is unable to reduce.

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How to confirm if you have mould in your air conditioner

You can purchase DIY kits to test for mould in aircon, these kits are relatively cheap and will confirm if you 100% have mould in your home. We recommend the SAN-AIR Mould & Bacteria Test Kit which can be purchased online for around $160 and will also test for bacteria and yeast which are food sources that enable mould to grow.

Mould in aircon can damage property

Mould can cause the coils in an air conditioning unit to rust as the mould keeps the cooling coils moist all the time & never gives them time to dry out. Rusty coils can damage the unit & lead to refrigerant leaks. Mould can also cause paint to peel and wood to rot in your home if left to get out of hand.

Mould in air conditioning units can also lead mould to grow on clothes and other household items as the mould spores are distributed throughout the home by the air conditioner’s indoor fan. Mould can cause the fabric to rot and the colours to fade. If mould is present in an air conditioning unit, it is important to remove it as soon as possible to prevent mould from growing on clothes.

Mould can also grow on food. Mould can cause food to spoil and make it unsafe to eat. If mould is present in food, it’s best to dispose of it as soon as possible to prevent food poisoning.

If mould is present in your air conditioning unit, it should be removed as soon as possible to prevent it from spreading & doing any further damage to your property.

How do I prevent mould from growing in my air conditioner?

You can prevent mould from growing in your air conditioner by booking an annual service for your air conditioner each year. If you notice mould growing in your air conditioner, check out the following quick and simple things you can do!

7 easy steps to keep your air conditioner mould free

  • Get your air conditioner serviced: At least once per year to prevent mould growth, the cost of an air conditioner service is quite low especially when your family’s health is at risk.
  • Arrange a Deep Indoor Coil Clean: This is a specialized process that should be handled by a professional technician. They will use a pressure washer to meticulously clean the cooling coil, removing mould and other build-up that may have accumulated over time.
  • Run your system in fan mode: If you have had your air conditioner running in cooling mode, rather than turn the system off when you leave home just change it to fan-only mode to allow the system to dry out.
  • Clean your return air filter: At least every three months (the more frequent the better), if you notice the filter is still dirty or worn out after cleaning book your local air conditioning repairer to come out and install new filter media.
  • Clean your grilles or ceiling diffusers: Wipe down your air conditioner grilles with a surface mould remover spray, these can be found online or at your local Bunnings.
  • Consider installing a dehumidifier: If you have unusually high humidity in your home look into installing a ducted dehumidifier to keep the relative humidity between 30-60% which will also help prevent mould growth.
  • Consider adding an air purification system: For your ducted air conditioners you could install a REME HALO by RGF that use UV light and a photocatalyst material to generate ions that inhibit mould. There are also solutions such as Panasonics Ceiling Mounted nanoe™X Generator that can be installed in the ceiling of each room to help prevent mould from growing!

If it’s time to replace your old air conditioner with a new one you should consider choosing a model that has built-in air purification such as the Panasonic nanoe™ X range of air conditioners

Air conditioning professionals can clean the mould within your ac unit for you!

brisbane mould removal experts

Smarter Air’s trained technicians come across mould in air conditioners almost every day, we use all-natural products made from 100% Australian essential oils when servicing or deep cleaning your AC that not only remove mould and other nasties but also help make your home smell fresh.

The most single important thing you can do to your air conditioner mould free is to ensure you get your system serviced every year, if the technician detects any signs of mould in the system they will recommend a deep clean which involves opening up the indoor unit and thoroughly washing down the cooling coils with a pressure washer & SAN-AIR surface mould remover.

Please Contact Us today to book your annual service, or chat with us from this page!

Sue Cee
Once again, brilliant customer service from start to end. Professional, courteous, explaining the process as they went along, Jacob and Will were great. I 100% recommend ...
Sue Cee
Once again, brilliant customer service from start to end. Professional, courteous, explaining the process as they went along, Jacob and Will were great. I 100% recommend Smarter Air & Electrical
Sue Cee
Sue Cee
Bhavesh Bhatt
The guys at Smarter Air did very good job at installing ducted system in my already built home. Starting from their Sales team to...
Bhavesh Bhatt
The guys at Smarter Air did very good job at installing ducted system in my already built home. Starting from their Sales team to customer rep to Electrician and installation team all were very professional and helpful. Highly recommended 👍🏼
Bhavesh Bhatt
Bhavesh Bhatt
Giuseppe Amenta
I was nothing but impressed of the leadership and workmanship of smarter air & Electrical crew ( Davis, Benji, Levi, Nav Jake and Will) that came ...
Giuseppe Amenta
I was nothing but impressed of the leadership and workmanship of smarter air & Electrical crew ( Davis, Benji, Levi, Nav Jake and Will) that came out to fit our Panasonic ducted air conditioner.The pre inspection was so important cause they new exactly what they were up for ! Thanks Davis !! The crew did a terrific job , they cleaned after themselves explained what they were doing and most of all respected the household which was very appreciative . We would highly recommend Smarter Air & Electrical to family and friends. Well done !! Thank you
Giuseppe Amenta
Giuseppe Amenta
Mel Daniels
Absolutely fantastic service. The team introduced themselves upon arrival, explained what was going to happen with the install. They cleaned up and show us how ...
Mel Daniels
Absolutely fantastic service. The team introduced themselves upon arrival, explained what was going to happen with the install. They cleaned up and show us how to use everything. Customer service is more 5 stars!
Mel Daniels
Mel Daniels
Larry Hodges
Wow!!! That is what comes to mind for the service, professionalism, and timeliness provided by Smarter Air. Will, Benji, Jack...
Larry Hodges
Wow!!! That is what comes to mind for the service, professionalism, and timeliness provided by Smarter Air. Will, Benji, Jack, Jake, Kesan, and Davis arrive on time, were friendly, and installed aircon. Before leaving they tested system, cleaned up and gave me walk through on system use. I highly recommended Smarter Air. Couldn’t be happier. Larry Hodges.
Larry Hodges
Larry Hodges
Ferdy K
After doing a good research, I found Smart Air Electrical prices the most competitive. The team presented good options depending on my budget so I ...
Ferdy K
After doing a good research, I found Smart Air Electrical prices the most competitive. The team presented good options depending on my budget so I ended up getting the Teco System with a 7 year warranty. The low price range was most attractive. It was also good to get 10% discount as well- so I saved another $900. The crew that installed the AC were very professional. They spent the whole day in my house and were very respectful. I am now enjoying cool air.
Ferdy K
Ferdy K
Andrew Nicholls
Smarter air and electrical did a fantastic job. Pre-sales service was informative and great value. They answered all of our questions and explained each option. ...
Andrew Nicholls
Smarter air and electrical did a fantastic job. Pre-sales service was informative and great value. They answered all of our questions and explained each option. The install was timely booked and the install crew arrived on time. The team was friendly, informative and responsive to our requests. The system was professionally installed and cleaned before a comprehensive run through of its controls and maintenance. Amazing service! Highly recommend.
Andrew Nicholls
Andrew Nicholls
Janelle G
Very organised company, quote for my new ducted air con completed straight away, communication was great throughout whole process, Installation went very smoothly and the ...
Janelle G
Very organised company, quote for my new ducted air con completed straight away, communication was great throughout whole process, Installation went very smoothly and the boys did a great job. Highly recommend!
Janelle G
Janelle G
Athar Ali
We are lucky enough to get our ducted aircon system installed by this company for a newly constructed house. Phil and Davis and their team ...
Athar Ali
We are lucky enough to get our ducted aircon system installed by this company for a newly constructed house. Phil and Davis and their team went above and beyond from pre sales to after sales services. Installation was carried out in the most professional manner and they are always approachable to answer all of your questions. Their knowledge and customer service is exceptional and I highly recommend this company.
Athar Ali
Athar Ali
Des Studdert
Smarter Air and Electrical installed our new Mitsubishi Ducted Air Conditioning system on Monday 27Nov2023. The installation team arrived on time and was led by ...
Des Studdert
Smarter Air and Electrical installed our new Mitsubishi Ducted Air Conditioning system on Monday 27Nov2023. The installation team arrived on time and was led by Tom. We were impressed with the professional approach and the care taken by the Team during the install. All our questions before, during and after the task were easily satisfied by the team. Handover, and brief on the system was pleasant and seamless. Since install the system has functioned very well, is whisper quiet and very effective. Thanks to Tom and his team of technicians for a job well done. Additionally, thank you to the greater Smartair team, Including, Sales, (Alex) Operations, and associated departments (Meg), for all their help and happy assistance. I thoroughly recommend Smartair for all your air conditioning needs. A very pleasant experience. Des and Sabine.
Des Studdert
Des Studdert

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