Why Does Your Aircon Smell Bad?

Switching on your aircon should release crisp, clean air. If you notice a musty, sour, or vinegar-like smell filling the room, airborne bacteria and fungal mold colonies are growing inside your indoor unit.

Because aircons absorb room moisture, dark and damp spaces between aluminum cooling fins provide ideal conditions for black mold (*Cladosporium*) and bacteria to thrive.

Causes of Aircon Bad Odors

• Mold Growth on Evaporator Coils: Organic dust and moisture feeding fungal mold colonies.
• Stagnant Water in Drain Pan: Trapped bio-slime producing a pungent, foul smell.
• Absorbed Household Odors: Cooking grease, durian smells, or pet odor absorbed into internal plastic casing panels.

How to Eliminate Aircon Odors

1. Chemical Wash Treatment: Applying specialized non-corrosive chemical cleaners to destroy mold spores and bacterial colonies on contact.
2. High-Pressure Coil Rinsing: Flushing away dissolved organic matter with clean water.
3. Anti-Bacterial Sanitizing Spray: Coating coils with sanitizing spray to retard future mold growth.