There’s nothing worse than switching on your aircon and being hit with a bad smell. Not only is it uncomfortable, but it can also be a sign that something is wrong. So, why does this happen? Let’s break down the common reasons your aircon might smell — and what you can do about it.
1. Mold and Mildew Build-Up
To begin with, one of the most common causes of a smelly aircon is mold or mildew growing inside the unit. This usually happens when moisture gets trapped, especially around the filters or cooling coils.
👉 Quick fix: Book a professional cleaning service. A general service or chemical wash can help remove mold and freshen the air.
2. Clogged or Dirty Filters
Another possible cause is dirty filters. Over time, dust and dirt build up, leading to a musty smell. Not only that, clogged filters can block airflow and reduce cooling efficiency.
👉 What to do: Clean or replace the filters regularly — at least once a month if you use your aircon often.
3. Pests in the Unit
Now and then, pests like insects or even small rodents can crawl into the aircon unit. If they die inside, they can cause a foul smell that lingers.
👉 Solution: If you suspect this, turn off your aircon and call a technician right away to check and clean the system safely.
4. Stagnant Water in the Drain Pan
In addition, your aircon naturally removes moisture from the air. If the drain pan is clogged or not draining well, stagnant water may collect — and that often smells bad.
👉 Fix it: During servicing, make sure the drain line and pan are cleaned thoroughly.
5. Burning or Chemical Odors
Finally, if your aircon smells like something is burning or has a chemical odor, this could mean a problem with the wiring or internal components. This is serious and should not be ignored.
👉 Take action: Immediately switch off the unit and contact a licensed technician to inspect it.
Stay Safe and Comfortable
In summary, unpleasant smells coming from your aircon are more than just annoying — they are often early warning signs of bigger problems. Whether it’s mold, pests, or blocked filters, fixing the issue early helps you avoid costly repairs later.
At Lion City Air Conditioner Services, our trained and friendly team is ready to help. We provide reliable inspections, cleaning, and servicing to keep your air fresh and safe.
📞 +65 8818 5781
🌐 www.lioncityaircon.com
✅ Breathe easy again — book your aircon service today!
