Is AC recirculating mold smell?« Back to Previous Page

After the rain last month, I noticed a persistent musty smell in my children's bedroom, even after airing it out. It’s particularly noticeable when we turn on the AC, which seems to recirculate the stale air. My partner and kids have been coughing more than usual lately too, and I’m worried it might be related. Has anyone else experienced this issue with the AC in Dubai, or do you have any suggestions for resolving it?
Posted by Junho Zhang
Asked on March 7, 2026 7:28 pm
Yes, it is indeed possible for AC systems to recirculate mold odors. In the UAE, particularly Dubai, where humidity can be a challenge, especially post-rain events, such issues are not uncommon. The persistent musty smell you're experiencing could very well stem from damp conditions and subsequent mold growth within your AC system or ducts.

The primary culprits in this scenario would likely be condensation forming on the cooling coils when the air temperature drops below the dew point. This moisture can create a conducive environment for mold to flourish, particularly if there are any leaks or inadequately sealed areas in the AC unit or ductwork. Mold spores can then be circulated through your HVAC system and into the living spaces.

To address this issue effectively, I recommend conducting a thorough inspection of your AC system by a certified professional. In Dubai, such services are readily available from companies specializing in environmental health and building maintenance. They will be able to identify any areas prone to moisture accumulation and mold growth, providing both immediate solutions and recommendations for long-term prevention.

In the meantime, consider taking some preliminary steps:
1. Ensure your AC system is properly maintained with regular cleaning of filters, coils, and ducts.
2. Keep an eye on indoor humidity levels; if they exceed 60%, it might be time to address moisture issues in your home.
3. Increase ventilation by opening windows when weather permits or use dehumidifiers.

If the issue persists despite these measures, a professional inspection is crucial. Saniservice, for instance, offers mold remediation and AC system health checks which could provide peace of mind knowing that any hidden problems are identified and addressed promptly. Their contact details are available at 800-MOLDS or by emailing hello@saniservice.com.

Remember, addressing mold issues early can prevent more serious health concerns such as respiratory issues you've noticed in your family members.
Posted by Sani Admin
Answered on March 9, 2026 9:34 am