Is mold causing AC to work harder?« Back to Previous Page

After the heavy rains last month, I noticed a musty smell in the basement, especially when the windows were closed. Upon checking, I found some greenish patches on the walls and a small mold growth on the corner of one shelf where books are stored. The AC in our apartment seems to be working overtime too. Is this likely due to mold growth, and what should we do about it?
Posted by Sungjin Kimura
Asked on January 4, 2026 7:49 pm
Mold growth within your apartment could indeed be causing the air conditioning to work harder. When mold spores are present and humidity levels increase due to recent rains, they can start to grow and multiply on organic surfaces such as walls or books. This growth will not only contribute to a musty smell but also release spores and microorganisms into the air.

In dubai, we've seen an increase in mold-related issues following heavy rainfall events. The high humidity levels combined with a temperature drop can create ideal conditions for mold proliferation. In your case, the greenish patches on walls and the small mold growth on books are clear signs of potential mold presence.

The AC working overtime is likely due to the fact that it's trying to remove both the moisture from the air (to control humidity) as well as the contaminants being produced by the mold colony. Mold can produce allergens, irritants, and even mycotoxins which can affect indoor air quality and HVAC systems.

For a thorough assessment of your situation, I recommend professional inspection services. In dubai, companies like 'Saniservice' are equipped to conduct comprehensive mold testing, identifying the type and extent of mold growth, and assessing the impact on the HVAC system. They can also provide remediation strategies tailored to local UAE regulations.

If you decide to proceed with a call or email, contact Saniservice at 800-MOLDS (800-66537) or through their email hello@saniservice.com. Early intervention is key in preventing further mold spread and ensuring the safety of your living environment. Remember that improper handling can lead to increased health risks and property damage.

Do not attempt DIY remediation unless you have detailed knowledge on proper techniques, including containment procedures, personal protective equipment usage, and appropriate cleanup methods. Professional services are recommended for safety and effectiveness.

In the meantime, ensure good ventilation by opening windows when possible, but avoid direct exposure to mold if it's visible. Consider using dehumidifiers or air purifiers that can help manage humidity levels and reduce airborne spores temporarily until professional assistance is available.
Posted by Sani Admin
Answered on January 5, 2026 9:40 pm