How to fix nad prevent AC condensation mold?« Back to Previous Page

The dark, fuzzy patches are likely mold growth fueled by the constant moisture from the condensation leak. The first step is to stop the source of the water. Check that the AC drain line is not clogged; this is a common cause. You can try flushing it with a mixture of warm water and vinegar. For the existing mold on the skirting board, a solution of white vinegar or a dedicated mold-cleaning product can be used on non-porous surfaces. Wear an N95 mask and gloves during cleaning to avoid inhaling spores.

Preventing its return requires managing the humidity your AC can't handle. In Dubai's climate, ACs often struggle with latent load (humidity removal), especially when set very low, which can cause the unit to cycle off before properly dehumidifying the air. Consider raising the temperature slightly to allow the unit to run longer cycles and remove more moisture. Using a standalone dehumidifier in the bedroom, particularly at night, will make a significant difference. Ensure the wardrobe is not pressed tightly against the wall to allow for air circulation behind it.

For a persistent leak or if the mold has spread inside the wall cavity, a professional inspection is necessary. They can use moisture meters and borescopes to assess hidden damage. In many cases, the wall may need to be opened to dry properly and treat the mold from behind, as surface cleaning alone won't be sufficient for a long-term solution.