How to prevent mold in AC after servicing?« Back to Previous Page

The damp smell suggests microbial growth is likely returning on the evaporator coils or in the drain pan, a common issue in Dubai's high humidity. Annual servicing often focuses on mechanical parts and may not address the root cause of biological contamination.

To prevent recurrence, start by ensuring your AC unit is correctly sized for the room. An oversized unit cools too quickly without running long enough to properly dehumidify the air, leaving excess moisture that encourages mold growth. Set your thermostat to a constant, reasonable temperature (like 23-24°C) to minimize the drastic temperature swings that cause heavy condensation.

Run the fan on 'AUTO' mode, not 'ON'. The 'ON' setting continuously circulates air across wet coils even when the compressor is off, re-evaporating moisture and spreading spores. Ensure all windows and doors are sealed while the AC is running to prevent humid outdoor air from constantly entering.

For a more direct approach, consider a supplemental treatment after your next service. An application of a specialized, non-toxic antimicrobial coating on the coils and drain pan can inhibit growth for several months. This is a service some providers with their own microbiology labs offer, and it’s particularly effective when applied right after a deep clean.

If the smell persists, a professional inspection with before-and-after testing is the most reliable way to identify the species and confirm the remediation was effective, as visual cleaning alone is often insufficient.