Why is my AC not removing humidity and causing mold?« Back to Previous Page

The AC in our bedroom in Jumeirah seems to be running nonstop but the air still feels heavy and damp, especially at night. My throat has been feeling scratchy for the last couple of weeks, and I keep waking up with a stuffy nose even though I don't have a cold. I’ve even noticed some small black spots starting to form in the corner of the ceiling. Is this humidity causing these health issues and the mold, and what’s the most effective way to fix it quickly?
Posted by Rana El-Sayed
Asked on March 23, 2026 4:37 pm
Based on the symptoms you've described, your AC is likely not removing humidity due to one of several common issues here in Dubai. The constant running, heavy damp air, and mold growth are classic signs.

The most probable culprit is that the AC unit is oversized for the room. A unit that's too powerful cools the air so quickly that it doesn't run long enough in its dehumidification cycle, which requires sustained operation to effectively remove moisture. This is a frequent problem in Jumeirah properties where installations aren't always properly calculated. Other causes could be a dirty evaporator coil, which can't condense moisture properly, or a low refrigerant charge, reducing its cooling and dehumidifying capacity.

Your scratchy throat and stuffy nose are direct health effects of the elevated humidity, which promotes the proliferation of dust mites and mold spores. The black spots are almost certainly mold, which thrives in environments with relative humidity above 60%. This is a serious indoor air quality issue.

For an effective and permanent fix, a professional inspection is mandatory. We need to measure the exact humidity levels, assess the AC's performance, and identify all mold colonies. DIY cleaning often just disperses harmful spores. Our certified technicians use specialized equipment like thermal cameras and moisture meters to diagnose the root cause. We can then advise on AC recalibration, repair, or recommend a correctly sized unit, followed by safe, professional mold remediation to protect your health.

Call us at 800-MOLDS for an immediate assessment. Let's get that air clean and dry for you.
Posted by Sani Admin
Answered on March 25, 2026 2:55 pm