AC leak causing black mold in closet, who to call?« Back to Previous Page

The black mold is likely returning because you've treated the symptom but not the root cause. In Dubai's climate, the primary issue is the AC condensate leak, which provides a constant moisture source for mold to regrow.

For the root cause, you need a certified HVAC technician to inspect the unit. They will check for a clogged condensate drain line, a damaged drain pan, or incorrect unit levelling – common issues here that cause water to leak indoors instead of draining outside. This is a mechanical repair that must be completed first.

Once the leak is fixed, the mold remediation can begin. For a recurring patch, professional removal is advised to ensure spores are contained and the wall is properly treated. Bleach only removes surface discoloration; it doesn't kill the roots (hyphae) penetrating porous materials like drywall or concrete. Certified remediators use specialized antimicrobial agents and techniques, and in many cases, a small section of the affected wall may need to be cut out and replaced if the contamination is deep.

For a case like this, the process is typically handled by two separate professionals: an HVAC company to fix the leak and a separate mold remediation specialist to safely remove the contamination. Some companies, like ours with an in-house microbiology lab, offer combined diagnostics to identify the mold species and verify the home is safe after cleanup through post-remediation testing.