Black mold symptoms from AC leak: what to do first?« Back to Previous Page

Those symptoms are a common sign of mold exposure, particularly from an AC system. The stuffy nose and sore throat that improve when you leave the apartment strongly suggest an indoor air quality issue. In Dubai's climate, AC units are a primary breeding ground for mold because the constant condensation from the cooling coils provides the moisture it needs to thrive.

The first step is to stop the leak immediately and have the AC unit inspected by a licensed HVAC technician. A persistent leak means there is an active moisture source, which will cause any mold problem to return even after cleaning. For the visible black spots, do not attempt to clean them with bleach or disinfectant yourself, as this can aerosolize the spores and worsen your exposure.

For proper identification and to understand the scope, a professional mold inspection is recommended. The inspector will use moisture meters and thermal imaging to find hidden dampness and may take air or surface samples. These samples should be analyzed by an accredited microbiology lab to identify the species, as this determines the appropriate remediation protocol. In many cases, the entire AC ductwork system requires specialized cleaning to remove the contamination, not just the visible spots around the vent. Prioritize companies that provide verifiable, lab-based before-and-after results for their work.