How to fix AC leak and black mold in bedroom?« Back to Previous Page

The black spots are likely mold growth, a direct result of the AC condensate leak creating a consistently damp environment. In Dubai's high humidity, this moisture doesn't evaporate, allowing mold to establish quickly.

First, stop the leak. The most common cause is a clogged condensate drain line. You can try flushing it with a mixture of warm water and vinegar, but if the leak persists, an AC technician is needed to clear the obstruction or repair the pump. This is the critical first step; cleaning without fixing the source is temporary.

For the mold on the wall, avoid bleach. It doesn't penetrate porous surfaces like drywall and can worsen indoor air quality. For a small area (under one square meter), scrub with a dedicated mold remover or a solution of detergent and water. Wear an N95 mask and gloves to avoid inhaling spores.

However, given the leak has been ongoing for weeks and there's a persistent stale smell, the mold is likely more extensive inside the wall cavity or AC unit itself, which you cannot see or safely clean. This is a common issue in apartments here due to constant AC use and condensation.

Professional assessment is strongly recommended. They will identify the full extent of the contamination, safely remediate the affected wall and AC interior, and most importantly, use moisture meters to verify the wall is completely dry after repair. This final step is essential to prevent immediate regrowth. For long-term prevention, ensure your AC unit is serviced annually to keep the drain line clear and maintain proper drainage.