How to fix AC leak causing black mold on carpet?« Back to Previous Page

The AC leak is providing the constant moisture source that black mold needs to thrive. Vinegar is a temporary surface cleaner but cannot address the root cause or the mold growing deep within the carpet and skirting board.

First, stop the leak. This is almost always a blocked condensate drain line, a common issue in Dubai due to dust and year-round AC operation. A technician needs to clear the line with a vacuum or pressurized flush. Do not just empty the drip pan; the blockage must be professionally removed to prevent immediate recurrence.

For the mold, surface wiping is insufficient. The carpet underlay and backing are likely saturated, acting as a reservoir. The affected section of carpet and padding must be removed and properly discarded. The concrete slab or floor underneath needs to be scrubbed with an EPA-approved antimicrobial cleaner, then thoroughly dried. For porous materials like damaged skirting boards, replacement is the only guaranteed solution.

To prevent its return, ensure the AC service includes a full cleaning of the drain pan and treatment of the drain line with an algaecide tablet to prevent future biological growth. Maintain indoor humidity below 60% using a dehumidifier, especially during the more humid winter months. The key is eliminating the moisture source entirely; otherwise, the mold will consistently return. Given the extent of water damage you describe, a professional inspection is recommended to assess the full scope and ensure the remediation is handled correctly.