How to check if my AC is causing black mold?« Back to Previous Page

Based on your description, this is a very serious situation that requires immediate attention. The location of the mold growth at the wall-floor junction is a classic indicator of a condensation issue, and in a Jumeirah villa, the chiller-based AC system is a prime suspect.

Here’s how to perform a preliminary check, but a professional inspection is highly recommended due to the health symptoms.

First, visually inspect the indoor fan coil units (FCUs) in each room. Remove the front grille and check the cooling coils and drip pan. Look for visible black/green mold growth, slime, or standing water in the pan. A musty odor when the AC kicks on is a major red flag.

Next, check the insulation on the chilled water pipes running to the FCU. In our humid climate, if this insulation is damaged or missing, the cold pipes will sweat profusely, soaking your walls and creating the perfect hidden environment for mold growth behind them. This is an extremely common cause in Dubai.

The constant humidity we experienced last month would have exacerbated any existing small issue into a major infestation. Your chiller's operation and drainage should be assessed by a specialist to ensure it's dehumidifying properly and not contributing to the problem.

Given your children are coughing, do not disturb the mold. Airborne spores will worsen the issue. This is not a DIY cleaning job. The wall likely needs invasive moisture metering and remediation.

Please call us immediately at 800-MOLDS (800-66537) for a comprehensive inspection. We'll use borescopes and moisture meters to find the exact moisture source, be it from the AC, a leak, or condensation, and provide a full remediation plan. Your family's health is the priority.