Can AC cause a musty smell?« Back to Previous Page

After the rain last month, I noticed a strange damp smell lingering in the bedroom. It’s only gotten worse since we ran the AC all day yesterday. The windows are usually kept open, but even with good ventilation, it still smells musty and there seems to be some dust that’s not settling properly. Could this be an issue with cleaning airborne contaminants? Any advice on what could be causing it and how to address it would be greatly appreciated.
Posted by Hannah Lee
Asked on January 15, 2026 10:59 pm
0
Yes, AC can indeed cause a musty smell. In the context of Dubai and other warm climates like it, your air conditioning system can become a breeding ground for mold if not properly maintained. The damp environment within the AC unit provides an ideal setting for microorganisms to flourish.

In the UAE, regulations such as EN 13788:2009 on Indoor Climate in Buildings suggest that HVAC systems should be cleaned and serviced regularly to prevent the accumulation of contaminants like dust, pollen, and mold. With the recent rain and now running your AC all day, it’s not surprising you’re experiencing this musty smell. The humidity from the rain might have introduced moisture into your home, which can mix with the cold air from your AC unit, creating an environment conducive to mold growth.

To address this issue, start by checking if there are any visible signs of water damage or condensation in areas around your AC unit and vents. If you notice any, it's important to clean these areas thoroughly. Use a mixture of warm water and mild detergent to wipe down surfaces where moisture has been present.

However, given the complexity and potential health risks associated with mold, I would recommend professional inspection and remediation services. In Dubai, companies like Saniservice can help you address this issue effectively. They have expertise in identifying the source of odors and ensuring that your AC system is thoroughly cleaned to prevent future occurrences.

For now, keep an eye on the smell. If it persists or worsens, don’t hesitate to contact Saniservice at 800-MOLDS (800-66537) for a professional evaluation. Remember, early intervention can save you from more extensive and costly issues down the line.

If you decide not to go with Saniservice, ensure that your AC unit is serviced annually by professionals who understand the specific climatic conditions in Dubai. Regular maintenance can help prevent such odors from arising.
Posted by Sani Admin
Answered on January 18, 2026 4:02 am