AC leaking and black mold: how to clean and fix?« Back to Previous Page

Stop using the AC unit immediately and address the leak first. The black spots are likely mold growth, fueled by the constant moisture from the condensation leak. In Dubai's high humidity, this is a common issue that can escalate quickly.

For cleaning, never dry brush the mold as it will release spores. For a small area (less than one square meter), you can carefully clean it yourself. Wear an N95 mask, gloves, and safety glasses. Use a mixture of detergent and water or a dedicated mold remover to scrub the affected wall surface. Ensure the area is dried completely with a fan afterward. However, given the leak has been ongoing and the mold is behind furniture, a professional inspection is strongly advised to assess the full extent, including inside the wall cavity.

The AC unit must be repaired by a certified HVAC technician to stop the source of the moisture. The leak is likely due to a blocked condensate drain line, which is extremely common here due to dust and biofilm buildup, or a faulty condensate pump. Simply cleaning the mold without fixing the AC will guarantee its return.

For a situation involving a leak and visible growth, the best course is to call a professional mold inspection service. They can properly contain the area, conduct air and surface sampling to identify the species, and perform remediation that includes fixing the moisture source. In Dubai, look for providers that operate their own microbiology lab, as this allows for precise identification and verifiable post-remediation testing to confirm the issue is resolved.