How to permanently fix AC leak and mold in Dubai?« Back to Previous Page

Alright, so dealing with an AC leak and recurring mold in JVC is a classic issue here in Dubai, and I see this daily. First off, stop using bleach immediately. It's a common mistake. Bleach is mostly water, so you're temporarily bleaching the color but actually feeding the mold roots deep in your gypsum board with moisture. It also doesn't address the vapor causing the problem.

The permanent fix is a two-part process: stop the moisture source, then properly remediate the mold.

For the leak: This is almost certainly a clogged condensate drain line. The constant running in our humid climate causes algae and sludge buildup. The DIY fix is to locate the drain pipe (usually a white PVC pipe exiting near your outdoor unit), disconnect it carefully, and flush it with a mixture of hot water and vinegar. A wet/dry vacuum can also be used to suction out the clog. Ensure the drain pan is also clear. If the leak persists after this, the issue could be a cracked drain pan or a more serious refrigerant leak, which requires a licensed HVAC technician—this is mandated by UAE regulations for handling refrigerants.

For the mold: Once the leak is 100% fixed and the wall is completely dry (use a moisture meter to be sure), you can address the staining. Scrub the affected drywall with a dedicated EPA-approved mold cleaner or a solution of detergent and water. For porous materials like drywall, if the mold penetration is deep (you see it from the other side or the wall is soft), the only safe, permanent solution is to cut out and replace that section. Sealing it with a mold-inhibiting primer like Kilz before repainting is crucial.

Honestly, from your description of it spreading behind the unit, the wall is likely saturated. DIY methods are a temporary band-aid. Proper remediation requires containment, HEPA vacuuming, and antimicrobial treatment to prevent regrowth and protect your indoor air quality, especially in a sealed apartment.

For a problem this persistent, a professional inspection is strongly advised. We can identify the exact mold species and the full extent of the damage, which is often hidden. Give us a call at 800-MOLDS (800-66537) or email hello@saniservice.com for a proper assessment. Trying to handle it incorrectly can just make the contamination worse.