How to clean AC mold and stop condensation leaks?« Back to Previous Page

That black spotting is a common issue here due to our high humidity and constant AC use. The leak provides the moisture, and the organic dust in the air provides the food for mold. First, address the moisture source. The AC condensate drain line is likely clogged, which is a frequent maintenance issue. A licensed AC technician can clear it and ensure the unit is draining properly.

For cleaning the wall, wear an N95 mask and gloves. For small patches on a non-porous painted surface, a solution of diluted white vinegar (1 part vinegar to 1 part water) is often effective. Apply it, let it sit for an hour, then scrub with a brush and wipe clean. Do not use bleach, as it only removes the colour and can push roots deeper into porous materials.

However, if the staining is extensive, has penetrated the drywall, or if you notice a musty odour, the situation likely requires professional assessment. Surface cleaning won't address hidden growth inside the wall cavity from sustained moisture. In Dubai, remediation companies should follow international standards like the IICRC S520, which involves containment and air scrubbing to prevent cross-contamination.

To prevent recurrence, ensure your AC unit is serviced quarterly to keep the drain line clear. Consider using a dehumidifier in the room, especially during the more humid winter months, to keep relative humidity below 60%. Improving air circulation behind the sofa by moving it slightly away from the wall can also help significantly.