How to fix damp AC causing mold and health issues?« Back to Previous Page

For the past month, the AC in our Jumeirah apartment bedroom has been making everything feel damp and cold, and we're waking up with sore throats and congested sinuses. I’ve noticed tiny black spots starting to form in the corner near the window, and our clothes in the closet never feel fully dry. What's the most effective way to tackle this dehumidification issue to improve our health?
Posted by Brittany Jackson
Asked on March 17, 2026 8:32 am
Based on your description, this is a classic case of an AC system failing to properly dehumidify, which is extremely common in Dubai's high ambient humidity. The damp, cold feeling and health symptoms are directly linked to elevated relative humidity and the subsequent mold growth (those black spots).

The core issue is likely that your AC's evaporator coil is cooling the air but not running the compressor long enough to adequately remove the moisture. This is often due to an oversized unit, a faulty expansion valve, or a clogged condensate drain line causing the coil to ice up or not drain properly. The moisture then gets re-introduced into your room.

Here's the most effective way to tackle this:

1. Immediate Action: Increase the fan speed to "High" and set the temperature no lower than 22-23°C. This allows the coil more time to extract moisture. Ensure no furniture is blocking the supply or return air vents.

2. Professional Inspection is CRITICAL: The visible mold indicates a established problem. DIY cleaning often just disperses harmful spores. A certified technician needs to:
- Inspect and clear the condensate drain line and pan.
- Check the refrigerant charge and compressor cycle.
- Perform a thorough hygienization of the entire ductwork and coil using EPA-approved biocides to eradicate the mold at its source. This is not a simple wipe-down.

Given the health symptoms you're experiencing, I strongly recommend a professional indoor air quality assessment. We use hygrometers to measure the exact humidity levels and thermal cameras to find hidden condensation points, all in line with Dubai Municipality's public health and safety guidelines.

For a proper inspection and remediation to solve the dampness and health issues for good, call our specialists at 800-MOLDS (800-66537) or email hello@saniservice.com.
Posted by Sani Admin
Answered on March 18, 2026 3:41 pm