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6 Reasons for Unpleasant Smells Coming from Your Aircon

aircon smell

Are you bothered by a bad smell when you use your air conditioner, especially after a busy day at work? Unpleasant odors can spoil the comfort and relaxation you seek at home. If there is aircon smell it could indicate the need for services like repair, ac installation, or a chemical overhaul from the best aircon servicing company in Singapore. Here are the main reasons for the foul odor from your air conditioner.

Here are the 6 reasons for aircon smell:


Clogged Air Filters

Blocked air filters trap pollutants and cause bad odors in your home's air. To get rid of these odors, replace the air conditioner filters or choose an air conditioner chemical wash.


Dead Animals in AC Vents

If your air conditioner smells bad, especially in the summer, there might be a dead animal in the ventilation unit. Check your home's AC vents to find the source of the unpleasant odor. If you discover deceased animals in the ducts, use a specialized tool to remove them. If you can't do it yourself, hire a professional AC service to solve the issue.


High Moisture in Air Ducts/Vents

Too much moisture in air ducts/vents can result from high humidity or an unnoticed drainage leak. If you notice a musty smell when using your air conditioner, there's a likelihood of mold and mildew in the ducts. Keep in mind that mold exposure can cause respiratory problems. To prevent this, have the ducts and vents cleaned and repaired to permanently remove musty odors. Also, think about regular air conditioner servicing.


Dirty Evaporator Coils

Evaporator coils cool the air by removing heat and then circulate it back into your room through air ducts. If your air conditioner smells bad, it likely means dust and dirt have built up on the coils. To prevent mold growth, it's advised to get the coils professionally cleaned.


Frozen Evaporator Coils

Your air conditioner brings in warm indoor air, removes humidity, cools it, and sends it back into your home through return vents. Clean filters are crucial for smooth airflow. If filters are dirty, particles obstruct the flow, leading to water droplets from humid indoor air collecting on the evaporator coils. As the air conditioner cools the air, this water condenses on the coils. It's recommended to replace filters every 2-3 months to prevent issues. 


Clogged Drain Pipe

A clogged condensate drain often causes bad odors in your air conditioner. The drain is supposed to collect moisture from the cooling coils and channel it away from your home. When the condensate drain is blocked, it promotes mold and mildew growth on the pan and drain lines of your air conditioner, leading to an unpleasant smell.

338 Aircon Servicing Singapore provides an extensive range of Aircon Services including Aircon Servicing, Aircon Repairs, Aircon Installation of the best aircon brands, Chemical Overhaul, Gas Top-up, Aircon Leaking Water, and Aircon Not Cold Fix, and more. We have a team of professional technicians who are equipped with vast knowledge and experience in the Aircon industry.

It’s always a good time to talk about the common issues that aircon units have. We have over 15 years of experience in dealing with aircon works and have completed thousands of aircon works for both residential (Landed, Condo, and HDB) and commercial. We are a highly recommended Aircon Company in Singapore, with many delighted customers and reviews over the years on Google and Facebook.

Call or WhatsApp us at +65 88554141 / for a transparent quotation and honest pricing for all your aircon needs or We offer a fast and efficient service to serve any of your aircon needs!

Learn more about 338 Aircon Servicing Singapore here:

👉 4088 x Google Reviews


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