In Kuala Lumpur’s warm and humid climate, air conditioners operate almost daily. Over time, moisture, dust, and bacteria can build up inside the system, leading to unpleasant smells coming from the indoor unit.
A bad smell from your aircon is more than just uncomfortable. It can indicate mould growth, drainage issues, or internal contamination that may affect air quality and your health if left untreated.
Mould and bacteria buildup
High humidity creates the perfect environment for mould and bacteria to grow inside the evaporator coil and blower area. This is the most common cause of musty or sour smells.
Clogged or dirty drainage system
When the drain pipe is blocked, stagnant water remains inside the unit. This often leads to unpleasant odours spreading through the room when the aircon is running.
Dirty air filters
Air filters that are not cleaned regularly trap dust, moisture, and organic particles. Over time, this buildup can produce noticeable smells when air passes through.
Dead insects or small animals inside the unit
In some cases, insects or small pests can enter the aircon unit. When they become trapped inside, they can cause a strong and persistent odour.
Chemical or burning smell from electrical components
A sharp or burning smell may indicate overheating wiring or electrical issues. This should be checked immediately to avoid further damage or safety risks.
When should you call an aircon technician?
You should call a technician if:
- The smell persists after basic cleaning
- The odour becomes stronger when the unit runs longer
- You notice mould, moisture, or water leaks
- The smell is chemical or burning
Ignoring bad smells can lead to health issues and system damage.
Aircon bad smell in Kuala Lumpur?
Our technicians can inspect your aircon, remove internal contamination, and restore clean, fresh airflow.