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

Phill Crawley

Smarter Air & Electrical

i 3 Contents

mould in aircon

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!

Tamara Dunkley
Davis, Amanda, Tom and the crew were fabulous! Lovely, polite gentlemen. Super knowledgable and helpful. Even helped me look for...
Tamara Dunkley
Davis, Amanda, Tom and the crew were fabulous! Lovely, polite gentlemen. Super knowledgable and helpful. Even helped me look for my anxious cat when he went ‘missing’ in the house. Cleaned up after and did a great job. Highly recommend this company and these guys. Clearly a well managed company, with happy employees.
Tamara Dunkley
Tamara Dunkley
Peter W
The Smart Air team were very efficient in completing the installation. They cleaned up everything after they finished the installation. Each member of the team ...
Peter W
The Smart Air team were very efficient in completing the installation. They cleaned up everything after they finished the installation. Each member of the team was very friendly and well mannered. They were happy to answer all my questions. The whole experience was a pleasant one. I would definitely have no hesitation in recommending this company to anyone who is looking to install air conditioning.
Peter W
Peter W
Jason Warren
Benji and his team of guys were the most polite, professional and knowledgeable service that we have received. They were on time and the work ...
Jason Warren
Benji and his team of guys were the most polite, professional and knowledgeable service that we have received. They were on time and the work preformed was faultless even to the vacuuming and cleaning at the end. I can not recommend Smarter air and Electrical enough including the initial quote we received and Amanda with her organising and communication. All first class
Jason Warren
Jason Warren
Nicola Alison
10 star review to the team at SmarterAir & Electrical have the WOW factor. Brilliant from start to finish. Having a Property Manager...
Nicola Alison
10 star review to the team at SmarterAir & Electrical have the WOW factor. Brilliant from start to finish. Having a Property Manager background and high standards I know quality service and you were fantastic! The Neo Panasonic unit ducted system is so quiet it’s a dream unit. Don’t even know it is on! Sensors in each room and can remotely turn the system off via the MyPlace app. Specialists in what you do and don’t outsource the annual service shows your genuine accountability “Thank you so much” to all involved, Alex, Davis, Amanda & Chris. Today the installation & electrical team, professional and friendly, Tom, Jake, Eden, Levi, Nav and Will were simply brilliant a Very big Thank you for making my day! They even vacuumed my house and cleaned up & used drop sheets when installing they really looked after my property. I will be adding lights and the garage door to the future to the MyPlace app and also will be upgrading my residential smoke alarms with them. I am a client for life and will recommend you to everyone. Nothing is too much trouble. I chose well and grateful for all of the answers to my questions. It takes a lot to WoW me these days, but you did, thank you for all your hard work.
Nicola Alison
Nicola Alison
Temnit Teshager
I had smart air & electrical for air conditioning service install a new unit and I couldn't be happier with the experience. From scheduling the ...
Temnit Teshager
I had smart air & electrical for air conditioning service install a new unit and I couldn't be happier with the experience. From scheduling the appointment to the completion of the job, everything was seamless. The technician arrived promptly, was courteous, and thoroughly explained the work that needed to be done. They also provided helpful tips for maintaining the unit in the future and cleaned the house after finishing the job.The pricing was fair, and the service was top-notch. I highly recommend them for all your air conditioning needs!
Temnit Teshager
Temnit Teshager
steve fernandes
Had my Panasonic ducted unit installed in December. They did not try and upsell me a unit that was too big for my house size ,...
steve fernandes
Had my Panasonic ducted unit installed in December. They did not try and upsell me a unit that was too big for my house size ,Other companies recommended 1 -2 (16kw-18kw)sizes bigger. Recommended a 12.5kw which would be sufficient for my home size or could get away with the larger 14kw(summers only getting hotter). Ended up going with a Panasonic 14kw Delux unit with MyAir. On the day all the materials were delivered 30 mins (6.30am) before the guys turned up. Started at 7 am and left by 2 pm, They check with me the location of each room where the ducts were going as I have fans as well. House was vacuumed and marks on the wall cleaned. The electrician stayed back till about 3 ish to finish up, test each zone and run through the MyAir tablet. Easy to deal with, quick responses with emails and calls and happy to work with me as I built a stand so my unit was of the ground. Also went up in the ceiling to finish off some work and the ducting is all tidy. Highly recommend!
steve fernandes
steve fernandes
Saji Joseph
Smarter Air and Electrical recently replaced our ducted Air Conditioning system. The team is very professional and their service from start to finish was excellent. ...
Saji Joseph
Smarter Air and Electrical recently replaced our ducted Air Conditioning system. The team is very professional and their service from start to finish was excellent. I would like to extend our special thanks to Jack, Benji, Jacob and Kesan who did the installation and the commissioning. Also, sincere appreciation to all the pre planning work carried out by Davis, Chris, Alex and Amanda. Everything went smoothly from start to finish. Thanks again.
Saji Joseph
Saji Joseph
Darren Maloney
The Smarter Air & Electrical team has been amazing to work with from start to finish. The team have made the process seamless and we ...
Darren Maloney
The Smarter Air & Electrical team has been amazing to work with from start to finish. The team have made the process seamless and we could not be hapier with the finished product. The process has been so good that we have a freind currently getting a system from the team I only have great things to say about my experience it was easy to send them your way. A big thank you to the team and I'm sure I will send more business your way.
Darren Maloney
Darren Maloney
Matthew Harriott
The guys at Smarter Air and Electrical are great. From the inspection and quote through to the install and after sales service the company is ...
Matthew Harriott
The guys at Smarter Air and Electrical are great. From the inspection and quote through to the install and after sales service the company is outstanding. The install team are professional and clean up after them selves. Once mine was complete, they even came back and did a neighbours as well. Highly recommended.
Matthew Harriott
Matthew Harriott
Dallas Werder
From the first interaction, quoting and installation- Absolute outstanding service. They were always on time, polite, professional, attentive and explained everything perfectly. We could not ...
Dallas Werder
From the first interaction, quoting and installation- Absolute outstanding service. They were always on time, polite, professional, attentive and explained everything perfectly. We could not be happier with our ducted air con. Use this company if you want ducted.
Dallas Werder
Dallas Werder

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