How to fix AC leak and remove black mold myself?« Back to Previous Page

The black spots are likely mold growth caused by the AC condensation leak. Dubai's high humidity provides ideal conditions for mold when moisture is present.

First, stop the leak. Check if the condensate drain line is clogged; this is a common cause. Locate the PVC pipe leading from your indoor unit to the drain. You can try flushing it with a mixture of warm water and vinegar. If the leak persists, the issue may be a damaged drain pan or a misaligned pipe, which requires a professional HVAC technician.

For the mold on a non-porous surface like the AC unit or metal, wipe it with a solution of detergent and water. For porous materials like drywall or carpet, DIY cleaning is often insufficient as mold penetrates deep. Small affected areas (less than one square meter) can be carefully cleaned by scrubbing with a borax or vinegar solution, but the material may remain stained and compromised.

To prevent recurrence, the leak must be completely fixed. Ensure the room is well-ventilated during and after cleaning. Run a dehumidifier or keep your AC on consistently to maintain low indoor humidity, crucial in Dubai's climate.

Given the leak has been ongoing for weeks, the moisture has likely spread behind the wall. Surface cleaning may not address the full extent. For a confirmed and lasting solution, a professional inspection is recommended. They use moisture meters to find hidden dampness and lab testing to identify the mold type, which dictates the proper remediation protocol, especially if it is Stachybotrys (true "black mold").