How to permanently stop AC leak and black mold growth?« Back to Previous Page

The black speckles are almost certainly mould, fueled by the constant moisture from your AC leak. In Dubai's humid climate, this is a common issue where condensation problems create ideal breeding conditions.

The most effective long-term solution requires addressing both the symptom and the cause. You cannot simply "kill" the mould for good without first stopping the moisture source. Wiping it away is a temporary fix; the spores remain and will return as long as the environment is damp.

Your immediate priority is a professional AC technician to diagnose and repair the leak. Common causes include a clogged condensate drain line, a damaged drain pan, or a refrigerant leak causing excessive ice buildup and subsequent dripping. This repair is essential to stop the water intrusion.

Once the leak is fixed, the mould remediation can begin. For a recurring problem like this, a professional inspection is recommended to assess the extent of growth within the wall cavity or AC unit itself, which you cannot see. The wall must be thoroughly dried using industrial dehumidifiers. The affected area then needs to be cleaned with appropriate antimicrobial solutions, not just bleach, which often only bleaches the mould without killing the roots. In many cases, porous materials like damaged drywall or insulation must be removed and replaced to prevent regrowth.

For verification, a post-remediation test, such as a surface sample sent to a microbiology lab, can confirm the mould has been effectively addressed and the space is safe. This is the only way to be certain the issue is resolved permanently.