Could AC mold be causing our headaches and stuffy noses?« Back to Previous Page

Yes, the black speckles in your AC and the damp smell are strong indicators of microbial growth, and they are very likely causing your symptoms. The constant stuffy noses and headaches that clear up when you leave are classic signs of exposure to mold spores and mycotoxins being circulated by your air conditioning system. In Dubai's high humidity, AC units are a prime breeding ground for mold due to constant condensation.

For a definitive answer, the mold would need to be identified by a lab culture, as some species are more problematic than others. However, any visible growth inside the unit, combined with your physical reactions, means it should be addressed promptly.

Responsibility for cleaning typically falls on your landlord, as maintaining the fixed AC unit and ensuring the property is habitable is their obligation under UAE tenancy law. You should formally notify them in writing, describing the issue and your health symptoms, and request a professional inspection and remediation. Do not attempt to clean the internal coils yourself, as improper cleaning can aerosolize more spores and worsen the problem.

A proper remediation involves a technician disassembling the unit, cleaning the evaporator coils and drip pan with EPA-approved biocides, and applying a protective coating to inhibit future growth. After cleaning, ensure they provide documented proof, such before-and-after ATP tests, to verify the cleanliness. To prevent recurrence, run your fan on auto (not constantly on) to allow the coils to dry and consider using a dehumidifier if indoor humidity consistently exceeds 60%.