Why is AC running more with mold growth?« Back to Previous Page

After the heavy rain last month, I noticed a musty smell in the basement, which is usually so dry. Upon checking, I found a small area of mold growing on one of the walls near the corner where it always gets damp after water seepage. The AC seems to be running more frequently as well. Has anyone else experienced similar issues and how did you prevent mold from spreading?
Posted by Hana Al-Rashid
Asked on February 27, 2026 8:18 am
The presence of mold growth can indeed lead to an increase in the operational hours of air conditioning units. In the UAE context, especially in areas like Dubai where humidity levels might not be as high naturally, AC systems are often relied upon for both temperature control and dehumidification.

When mold starts to grow, it releases moisture into the surrounding environment. This additional moisture increases the relative humidity inside a building, which can trigger your air conditioning system to work harder to maintain comfortable conditions. The musty smell you mentioned is indicative of this increased humidity levels as well as the presence of mold.

In Dubai's climate, AC units are frequently used year-round for both cooling and dehumidification. If there’s even a slight increase in moisture due to mold growth, it can push your air conditioner into a more intensive operation mode. This could mean longer run times or higher power consumption than usual.

To prevent this issue from escalating, it's crucial to address the mold problem as soon as possible. Regularly inspect damp areas, particularly basements and corners that might get water seepage, especially after rainfall events. Addressing these issues can help in reducing the need for your AC to work overtime due to increased humidity.

Professional inspection is recommended here. Companies like Saniservice (contact 800-MOLDS or email hello@saniservice.com) specialize in mold remediation and can provide a thorough assessment of the situation, ensuring that the root cause of moisture is identified and addressed properly.

Additionally, maintaining proper ventilation and using dehumidifiers in damp areas can help reduce humidity levels. Regular cleaning and maintenance of AC units also contribute to their efficiency. Make sure filters are clean, ducts are free from obstructions, and there’s no leakage or blockage that could be hindering its performance.

In conclusion, addressing the mold growth promptly not only improves indoor air quality but also helps in maintaining your air conditioning system's efficiency, reducing energy consumption, and extending its lifespan.
Posted by Sani Admin
Answered on March 1, 2026 11:31 am