Can I clean AC mold with bleach or call a pro?« Back to Previous Page

My AC in the bedroom closet has been leaking a bit, and now I’m seeing black spots on the wall behind our shoes. It’s been like this for a couple of weeks and the humid weather isn't helping. Is this something I can clean with bleach myself, or do I need to call a professional company to check for deeper issues?
Posted by Ghada Al-Hassan
Asked on March 16, 2026 12:43 am
Based on your description, what you're seeing is very likely active mold growth, a common issue here in the UAE due to our high humidity and AC condensation problems. While it's tempting to reach for bleach, I strongly advise against it for this specific scenario.

Bleach is ineffective on porous surfaces like drywall and grout. It only bleaches the surface mold you can see, leaving the root structure (hyphae) intact deep within the wall. This creates a false sense of security, and the mold will return quickly, often worse than before. Furthermore, mixing bleach with other cleaners or the organic material present can release dangerous chlorine gas.

The leak from your AC unit is the critical issue. The moisture has almost certainly penetrated the wall cavity, and the mold growth behind the surface could be extensive. Simply wiping the visible spots does not address this hidden contamination or the ongoing water source.

For a situation involving an active leak, visible growth on building materials, and a duration of weeks, a professional inspection is not just recommended—it's essential. Our certified inspectors use moisture meters and thermal imaging cameras to assess the full extent of the water damage and hidden mold behind the walls. This allows for a targeted remediation plan that addresses the root cause, not just the symptom.

You need to fix the AC leak immediately and get the affected area properly assessed. For a definitive diagnosis and a quote to solve the problem correctly, please call our team at 800-MOLDS or email hello@saniservice.com. Let's ensure your home is safe and healthy.
Posted by Sani Admin
Answered on March 17, 2026 3:26 pm