With global warming, summers are getting hotter and our reliance on air conditioning is increasing. In our daily lives, we often find that air conditioners develop an unpleasant odor after a period of non-use. Today, Coldar Electrical Equipment is here to discuss the reasons behind the odor in air conditioners and how to deal with it. Curious friends, come learn more!
Reasons for Odors in Air Conditioners:
1. Extended use of air conditioners without regular cleaning leads to dust accumulation in the filters and copper fins, as well as between the heat exchanger fins. Once a certain amount of dust has built up, it can cause blockages; this results in an unpleasant odor. As the air conditioner is turned on, the smell from the air outlet disperses into the air.
2. After air conditioners cool or heat a room, moisture often accumulates inside the indoor unit. As a result, without a dehumidifying and mold-preventing function, the air conditioner will immediately shut off after being turned off. This allows the internal moisture to persist, leading to mold growth over time and naturally causing a musty odor.
3. Air conditioners that have been unused for a long time can also emit odors upon startup. This is because the condensation water that accumulates on the heat exchange coils, fins, and surrounding components slowly evaporates, creating a high-temperature environment conducive to microbial growth around the coils. The large amount of gas produced during microbial proliferation is then released into the air conditioning system, becoming the source of the odor.

4. Some ventilation terminal systems with non-high-efficiency filters, such as factory buildings, office buildings, hotels, shopping malls, and guest rooms, despite having nice indoor decoration and filtered fresh air and air conditioning, still show dust accumulation near the indoor air outlets and on window sills. Dust can also be found adhering to the surfaces of internal components. It is believed that the large amount of dust brought in by the fresh air and accumulated in these areas not only carries microorganisms but also provides essential nutritional conditions for their proliferation, leading to unpleasant odors in the air conditioning.
How to Handle Air Conditioner Odors:
Whether used frequently or occasionally, air conditioners should be regularly cleaned. You can purchase a dedicated air conditioner cleaner, remove the filter by opening the indoor unit's shell, and you'll see the evaporator with metal fins. Spray the cleaner evenly into the evaporator while the power is off, wait for 15 minutes, then turn on the air conditioner. The dirt will be flushed away with the condensate water, easily removing odors.
2. During the air conditioner cleaning process, simply cleaning the filter is not enough, as the filter only filters a portion of the dust. A significant amount of dust, mites, pollen, and mold still accumulates on the heat exchanger! This also leads to a buildup of a large number of pathogens. Cleaning and disinfecting the heat exchanger is crucial. We can take an extra step during each air conditioner cleaning to not only clean the filter but also wash and disinfect the heat exchanger. This ensures effective suppression of bacteria growth on the heat exchanger, which can pollute indoor air, and truly eliminate odors.
3. Air conditioners should be disinfected monthly, and a thorough cleaning and disinfection should be performed before the first startup of the air conditioner during each seasonal change. However, during months with frequent use like summer, when people may spend long hours indoors, the indoor air quality directly affects our health. Therefore, it is necessary to regularly clean the air conditioner.
As air conditioners provide us with convenience and a comfortable living environment, it's essential to maintain them regularly to prolong their lifespan. After proper cleaning, you'll never have to worry about unpleasant odors again. Enjoy a cool and comfortable summer to the fullest!





