Quick Answer: Why there is mold inside your aircon
Mold inside an air conditioner is caused by constant moisture combined with internal dirt buildup. In Kuala Lumpur’s humid climate, condensation settles on the evaporator coil, blower, and drain pan. If these parts are not deeply cleaned, mould spores grow and spread through the airflow. Proper chemical wash removes the mould at the source, while ongoing maintenance prevents it from returning.
Where Mold Commonly Forms Inside an Aircon
1) Evaporator Coil & Coil Fins
The coil stays wet during operation. When dust sticks to the fins, moisture becomes trapped and mould begins to grow deep inside the coil.
- Signs: Musty smell, reduced cooling efficiency, allergy irritation.
- Risk: Mold spores are blown directly into the room.
Our solution: Aircon Chemical Wash — deep internal coil cleaning to eliminate mould safely.
2) Blower Fan & Airflow Path
Mold often forms on the blower where airflow is weaker and moisture lingers. This causes spores to spread every time the aircon is switched on.
- Signs: Visible black spots, smell appears immediately at startup.
- Risk: Continuous exposure to mould-contaminated air.
Our solution: Chemical Wash — removes mould from hidden airflow components.
3) Drain Pan & Drainage Area
Standing water in the drain pan creates the perfect environment for mould growth. Once established, mould spreads quickly to nearby components.
- Signs: Persistent damp smell, recurring contamination after light cleaning.
- Risk: Drain blockage, water dripping, and recurring odour.
Our solution: Aircon Chemical Wash + follow-up Aircon Maintenance to keep the drainage area clean.
Why Mold Inside Aircon Is Common in Kuala Lumpur
Kuala Lumpur’s high humidity and daily aircon usage mean that internal components rarely dry out completely. Without deep internal cleaning, moisture mixes with dust and organic particles, allowing mould to grow silently inside the unit.
How Our Technicians Remove Mold Safely
- Internal Inspection: Identify mould presence on coil, blower, and drain pan.
- Controlled Chemical Wash: Break down mould and biofilm without damaging components.
- Drainage Cleaning: Remove slime and standing water that supports mould growth.
- Hygiene Stabilisation: Recommend maintenance intervals to prevent recurrence.
Concerned about mould inside your aircon?
Start with a Chemical Wash and keep it under control with Aircon Maintenance.
Real Cases in Kuala Lumpur (Proof of Work)
Chow Kit (Older Apartments & High Occupancy Units)
In Chow Kit apartments, mould inside air conditioners is commonly found in units
that run daily in crowded living environments.
During inspections, we often discover heavy mould growth on the evaporator coil
and blower area caused by constant moisture and limited internal drying time.
Once a full chemical wash is performed, airflow becomes noticeably cleaner
and mould-related odour does not return when maintenance is kept consistent.
Bangsar (Residential Condos & Family Homes)
In Bangsar properties, mould issues usually develop in air conditioners used
overnight in bedrooms.
The combination of closed rooms, long operating hours, and humidity leads to
condensation staying trapped inside the unit.
Our technicians typically find early-stage mould on the coil fins and drain pan.
A chemical wash removes the contamination safely,
while scheduled maintenance prevents the mould from spreading again.
Brickfields (High-Rise Living & Rental Units)
In Brickfields high-rise residences, mould inside aircon units is frequently linked to
irregular servicing and tenant turnover.
Units may appear functional but internally show mould growth due to long gaps between deep cleaning.
After chemical wash treatment, indoor air quality improves immediately,
and follow-up maintenance keeps the unit hygienic despite continuous daily use.