How to Identify Mould in Your Aircon Units (Split Systems & Ducted) With Logan Air & Electrical
Breathe Easy – Know the Signs Before It Affects Your Health
At Logan Aircon and Electrical, we’re not just about keeping you cool, we’re committed to keeping your indoor air clean and safe. One of the biggest hidden threats in air conditioning systems is mould. It thrives in dark, moist environments, making your split system or ducted aircon unit the perfect home if regular maintenance isn’t done.
Left untreated, mould can cause musty smells, poor air quality, and even serious health issues, particularly for people with allergies, asthma, or weakened immune systems.
Here’s what to look out for:
Common Signs of Mould in Air Conditioning Systems
1. Unusual Musty Odours
If a strong, damp, or musty smell hits you every time the unit is turned on, there’s a good chance mould is growing inside. This smell is often strongest near the indoor unit or vents.
2. Visible Black or Grey Spots
Check the vents, filters, and coils. Black, grey, or green patches can be mould colonies. In split systems, you might see it behind the front panel. In ducted systems, look near the vents or inside the return air grille.
3. Excess Moisture or Condensation
Water that isn’t draining properly can create the perfect breeding ground for mould. If you see moisture around the indoor unit or ducts, that’s a red flag.
4. Unexplained Allergy Symptoms
Runny nose, itchy eyes, sneezing, or tight chest when the aircon is running? It could be a reaction to airborne mould spores circulating through your system.
5. Black Dust Around Vents
This could be mould spore residue, not just regular dust. If you wipe it and it quickly returns, it’s time for a deeper inspection.
Mould in Split Systems vs Ducted Aircons
- Split Systems: Mould commonly forms on the evaporator coils, filters, and behind the louvre blades. These areas are often damp and dark, making them ideal for mould growth.
- Ducted Systems: Mould can spread through the ductwork, especially if the system is poorly ventilated or the filters haven’t been changed regularly. Because ducted systems cover multiple rooms, this can quickly affect your entire home or office.
What to Do if You Suspect Mould
If you notice any of these signs, it’s important to act quickly. At Logan Aircon & Electrical, we offer professional aircon cleaning and mould treatment services to remove mould safely and prevent it from returning.
Our team can:
✔ Inspect and clean split system and ducted units
✔ Remove and treat mould from internal components
✔ Clean or replace filters and drain lines
✔ Improve airflow and drainage to reduce future growth
Prevention is Better Than Cure
To avoid mould buildup:
- Book regular servicing (at least once per year)
- Clean filters monthly (especially in humid months)
- Ensure your unit drains properly and isn’t leaking
- Keep humidity in check with proper ventilation or dehumidifiers
Need Help? Call the Local Experts
If you’re in Logan or surrounding areas and suspect mould in your aircon unit, don’t wait. Breathe easy again with a professional clean from the team you can trust.