How to stop AC leak and mold before contacting landlord?« Back to Previous Page

The AC in my apartment seems to be constantly leaking water onto the carpet in the master bedroom closet. It’s created a damp patch and I’ve just spotted the first signs of black mold forming on the baseboard. We’ve lived here for 2 years and this started after the last maintenance service. What’s the best way to tackle this myself to stop it from spreading before I have to call the landlord?
Posted by Qiang Yamamoto
Asked on May 5, 2026 2:20 pm
AC leaks are common here due to our high humidity causing rapid condensation. Your priority is stopping the moisture source. The leak is likely a clogged condensate drain line, which can happen if maintenance was not thorough.

First, turn off the AC unit at the circuit breaker to prevent electrical damage. Place a shallow pan or towels directly under the leak to catch water and protect the carpet. If you can safely access the drain line (usually a white PVC pipe near the indoor unit), check for visible blockages. A wet-dry vacuum can sometimes suction a clog out from the pipe's exit point outside your apartment.

For the mold, your goal is containment until a professional assessment. Wipe the visible black spots on the baseboard with a rag and a solution of diluted detergent. Do not use bleach, as it doesn't kill mold roots and can worsen indoor air quality. Immediately dispose of the rag in a sealed bag.

These are temporary measures. In Dubai's climate, hidden moisture in walls or under carpets can lead to extensive mold colonization within 72 hours. DIY fixes address the symptom, not the root cause, which could be a faulty installation, broken drain pan, or improperly serviced unit.

Document everything with photos and dates for your landlord. For health and contractual reasons, this situation requires professional diagnosis. The landlord is typically responsible for fixing the AC and associated damage. A proper remediation involves moisture meters to find hidden dampness and HEPA vacuuming to remove spores. Since the mold growth is linked to a building system failure, insist they hire a certified company that provides before-and-after lab testing to verify the space is truly remediated.
Posted by Sani Admin
Answered on May 7, 2026 10:06 pm