How to clean and stop AC mold from leaking?« Back to Previous Page

The AC in my bedroom has been leaking a bit of water onto the carpet for a couple of weeks, and now I’m starting to see these small black speckles on the wall behind the unit. With the humidity rising again, I’m terrified it’s the start of black mold. What’s the best way to clean this small area and what can I do to stop the AC from causing this problem in the future?
Posted by Emily Garcia
Asked on March 29, 2026 8:11 am
Based on your description of an AC unit leaking onto the carpet and the subsequent appearance of black speckles, this is a classic scenario we encounter in Dubai due to our high humidity and year-round reliance on air conditioning. The black speckles are highly indicative of mold growth, likely Stachybotrys chartarum (black mold) or Aspergillus niger, which thrive in the damp, cellulose-rich environment of wet drywall and carpet backing.

For a small, visible area, you can attempt a preliminary clean using a solution of detergent and water. However, extreme caution is advised. The mold's root system (hyphae) can penetrate deep into porous materials like drywall, which often cannot be fully cleaned and may require replacement. Disturbing the mold without proper containment can aerosolize spores, spreading the contamination throughout your bedroom. We strongly recommend against using bleach, as it is ineffective on porous surfaces and can exacerbate moisture issues.

The critical first step is to stop the moisture source. The AC leak is likely due to a blocked condensate drain line, a common issue here where dust and microbial growth clog the pipe. You must have a licensed HVAC technician service the unit, clear the drain line, and ensure the drip pan is functioning correctly. This is not just a maintenance issue; under Dubai Municipality regulations, HVAC systems must be maintained to prevent conditions that adversely affect indoor air quality and public health.

Given the potential health risks associated with black mold and the high probability of hidden growth within the wall cavity or under the carpet, a professional inspection is imperative. Our certified mold inspectors use moisture meters, thermal imaging, and air quality tests to assess the full extent of the contamination, which is almost always greater than what is visible.

For a definitive assessment and safe, guaranteed remediation, please contact our specialists. Call Saniservice at 800-MOLDS (800-66537) or email hello@saniservice.com to schedule an inspection.
Posted by Sani Admin
Answered on March 31, 2026 6:15 am