Why is there a mildew smell in my AC unit?« Back to Previous Page

After the rain last month, I noticed a mildew smell coming from the air conditioning unit in our bedroom. It's particularly noticeable after we run the AC at night. The smell is pretty unpleasant, and my partner has been complaining about it. We’ve lived here for 2 years and just noticed this issue, which didn’t exist before. How can I prevent this from happening again?
Posted by Youssef Al-Hassan
Asked on December 20, 2025 8:14 am
0
The mildew smell in your AC unit is likely due to moisture build-up. In the UAE, especially during the rainy season, humidity levels can rise and create an ideal environment for mold growth. Your AC unit probably doesn't have enough drainage or might be designed improperly to handle such conditions. This leads to water accumulating in parts of the system where it's not meant to be, fostering the growth of mildew.

In Dubai, we frequently face such issues due to our climate and the way buildings are often constructed. It’s not uncommon for AC units to struggle with moisture, especially if they're installed near bathrooms or kitchens, areas that tend to produce more condensation.

To prevent this from happening again, you should regularly check your AC unit for proper drainage. Make sure there's no blockage in the drain lines and that water is flowing freely out of your system. If necessary, consider having a qualified HVAC technician clean and inspect your AC unit annually or bi-annually, especially if you're experiencing issues like this.

Another important step is to ensure good ventilation throughout your home. Using exhaust fans when cooking or taking showers can help reduce humidity levels inside the house. Also, keeping your windows sealed during heavy rains can prevent outside moisture from seeping in and increasing the risk of mold growth.

If the smell persists despite these measures, it might be time to seek professional assistance. In Dubai, companies like Saniservice are experts in environmental inspection and remediation. They offer services such as mold testing, air quality assessments, and comprehensive cleaning programs for AC units. You can reach them at 800-MOLDS or email hello@saniservice.com for a detailed evaluation.

Remember, preventing mold is key to maintaining good indoor air quality, especially in such challenging climates as ours. Taking proactive steps now could save you from more serious issues down the line.
Posted by Sani Admin
Answered on December 23, 2025 3:16 am