How to stop AC leak and black mold for good?« Back to Previous Page

The black speckles are likely mold growth, a common issue in Dubai apartments due to high humidity and constant AC use. The damp carpet from the leak creates an ideal environment for it to thrive.

First, address the AC leak immediately. The most common cause is a clogged condensate drain line. Turn the AC off at the breaker. You can attempt to clear the line yourself by vacuuming from the drain outlet outside or flushing with a vinegar solution, but this is often a temporary fix. For a permanent solution, a certified HVAC technician should service the unit to clear the blockage, check the drain pan, and ensure the pump (if present) is working. Regular professional maintenance is key to preventing recurring leaks.

For the mold on the wall, do not attempt to clean it with bleach. Surface cleaning removes the visible stain but not the root structure embedded in porous materials like drywall. The wall cavity behind may also be contaminated from the prolonged moisture. The most effective method is to cut out and replace the affected drywall section. This is a job for mold remediation professionals who will use containment barriers and HEPA filtration to prevent spores from spreading to other parts of your home during the process.

To stop it from coming back, control humidity. Ensure your AC unit is correctly sized and functioning to effectively dehumidify the room. Run the AC on "Dry" mode if available. Use a hygrometer to keep indoor humidity below 60%. Improve air circulation by periodically opening windows when outdoor humidity is lower and regularly moving furniture away from walls. For persistent dampness issues, a dehumidifier can be a worthwhile investment.

Given the leak has persisted for months, a professional inspection is strongly recommended to assess the full extent of moisture damage and mold growth within the wall. They can provide a verified post-remediation assessment to confirm the environment is returned to a healthy state.