After a tiring day, when we arrive at our hot rooms, the first thing we often do is rush to the remote to turn on the air conditioner for a refreshing cool breeze. But instead of feeling cool and fresh air, sometimes a musty, damp smell hits the nose, causing headaches and spoiling the mood to relax.
The problem of musty odors from air conditioners is a classic issue that can happen in any home. Thairath Online will delve into the real causes and share useful tricks to easily handle this problem yourself, restoring pure air to your room again.
What causes the musty smell in air conditioners? The main cause of the musty odor from an air conditioner is none other than " accumulated moisture " inside the unit itself. When the air conditioner operates, condensation occurs, turning water vapor into droplets inside the unit, keeping the evaporator coil constantly moist. Combined with dust, skin flakes, or dirt collected daily, these become breeding grounds for mold and bacteria, which develop into mucus and emit a musty smell along with the air flow.
Additionally, a clogged drain pipe or improper installation—such as discharging the drain pipe directly into a public sewer—can cause unwanted external odors to flow back into the room through the air conditioner.
Try removing the filter and cleaning it at least every two weeks by rinsing off dust with water, avoiding stiff brushes that might damage the mesh. Then, dry it thoroughly in the shade before reinserting. This not only reduces musty odors effectively but also helps the air conditioner cool faster and saves electricity.
This simple trick is often overlooked. About 15-30 minutes before turning off the air conditioner or leaving the room, switch from Cool mode to Fan mode. This allows the internal fan to blow air and dry the moisture remaining on the evaporator coil, effectively interrupting mold growth.
For those who find the musty smell deeply embedded, foam spray cleaners for DIY air conditioner cleaning are widely available. Simply spray foam evenly on the evaporator coil, leave it for the recommended time on the can, and the foam will break down dirt and germs, then dissolve into water that drains away via the drain pipe without the need for rinsing.
However, if after trying all these methods, the air conditioner still smells musty, it may be a sign that it's time to call a professional technician for a "deep clean," which involves disassembling internal parts for thorough cleaning. This procedure should be done regularly every six months. Proper air conditioner maintenance not only eliminates unpleasant odors but also benefits our respiratory health in the long term.