Mold inside your aircon is more common than many homeowners think, especially in humid Singapore. You may notice a musty smell, dark spots on the vents, or even allergy symptoms. These signs often appear after the unit has been running for months without proper servicing. However, the good news is that mold is preventable. Once you understand what causes it, you can stop the problem early and keep your home cool, clean, and healthy. This guide explains the main causes of mold in Singapore homes and how to fix them with simple steps and proper aircon servicing.
Why Aircon Mold Happens (Especially in Singapore)
1. Singapore’s Humidity Creates the Perfect Environment
Singapore’s humidity often stays above 80%. Because of this, moisture builds up inside the evaporator coil, blower, and drain pan. Eventually, this trapped moisture encourages mold to grow quickly. As a result, mold spreads inside the aircon and into your room every time you switch it on.
2. A Dirty Blower Wheel Traps Moisture
When dust collects on the blower wheel, it traps moisture and slows airflow. Over time, this creates a damp environment where mold grows easily. Soon, the mold spreads across the entire system and produces a strong musty smell.
3. A Clogged Drain Pipe Causes Stagnant Water
A blocked drain pipe is another common issue. When the pipe clogs, water cannot escape, so it starts pooling inside the unit. Consequently, this stagnant water becomes the perfect place for mold, algae, and bacteria to grow.
4. Irregular Aircon Servicing
Many homeowners wait until the aircon stops cooling before calling a technician. However, mold often forms long before that. Dust, moisture, and dirt build up fast in Singapore’s climate. Without regular servicing, your aircon becomes a breeding ground for mold.
Warning Signs Your Aircon Already Has Mold
Look out for these early signs so you can take action before the problem gets worse:
Musty or sour smell when switching on the aircon
Black or green spots on the vents
Increased sneezing, coughing, or eye irritation
Weak airflow
Water dripping or leaking from the unit
How to Stop Aircon Mold for Good
1. Schedule Regular Aircon Servicing
Routine servicing removes dust, moisture, and bacteria before mold grows. Ideally, most Singapore homes should service their aircon every 3–4 months.
2. Deep Clean Through a Chemical Wash
If the mold is severe, a standard service may not be enough. A chemical wash removes deep mold, sludge, and bacteria that hide inside the coil and drainage system.
3. Keep Your Room Well-Ventilated
Open your windows for a short period each day. This way, humidity drops and mold growth slows down.
4. Use Dry Mode
Dry mode reduces moisture in the air and lowers humidity inside the aircon. Therefore, it helps prevent mold from forming.
5. Run Fan Mode After Use
Running fan mode for 10–15 minutes helps dry the internal parts of the aircon. In turn, this prevents moisture from settling and feeding mold.
When You Should Call a Professional
If the smell is strong or mold keeps returning, then the problem is deeper inside the system. In cases like this, you need a professional team like Lion City Aircon, a trusted provider of aircon servicing in Singapore.
Let Lion City Aircon Keep Your Home Mold-Free
At Lion City Aircon, we offer aircon cleaning, mold removal, and chemical wash services in Singapore. With Singapore’s humid weather, regular servicing is the best way to keep your unit running clean and cool. Most importantly, it protects your home from unhealthy mold.
If your aircon smells musty or you see mold spots, don’t wait. Because mold spreads fast, early cleaning saves you money and keeps your air fresh.
Book your aircon servicing with Lion City Aircon today.
📞 Call us at +65 8818 5781
🌐 Book your service online: lioncityaircon.sg
Enjoy cleaner air, better cooling, and peace of mind.
