An air conditioning expert points out what we should do to avoid the bad smell of the split: “The ideal is at the beginning of each season”
Dirt and mold are the main culprits behind bad odors. To prevent them, filters should be cleaned at the beginning of each season.

Air conditioning is one of the top allies in fighting the summer heat. Keeping the home cool during high temperatures is essential for comfort and well-being.
To achieve this, it’s important to ensure the unit is working properly and maintained before use, especially when it comes to the filters — which are key to avoiding unpleasant smells. “Ideally, filters should be cleaned at the start of every season,” said an expert from Expert Clima.
She emphasized that dirt and mold are the two most common causes of those bad odors, and for this reason, stressed the importance of proper upkeep. The expert also pointed to the air conditioning unit’s exterior, where dirt tends to accumulate.
“In the outdoor unit, dirt collects on the heat exchange coil, reducing efficiency and power, and this causes unpleasant smells.”
However, she noted, the bad odor can also come from the home’s piping system, which may be absorbing unwanted smells.
To solve this, she recommended installing a trap (siphon) in the drain pipe. Overall, proper maintenance of your air conditioning unit will help cool down indoor air more effectively.
If air conditioning isn’t available, fans can be a helpful alternative to beat the summer heat.
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