Ductless AC units, also known as mini-splits, are a great way to keep your home comfortable year-round. They’re quiet, energy-efficient, and easy to use. However, similar to any other type of cooling system, they need routine maintenance. One common issue homeowners face with ductless mini-splits is mold growth inside the unit.
Ductless systems move cool air and moisture. This can create a perfect environment for mold if not maintained. You can keep your mini-split fresh, clean, and mold-free by following a few simple steps.
Keep the Filters Clean
Your unit’s air filters are the first line of defense against mold spores, dust, and allergens. When the filters are dirty, airflow becomes restricted, and moisture can build up. Strive to clean your filters at least once a month during peak usage. Most ductless units have reusable filters that you can rinse with warm water and let air dry before putting them back.
Wipe Down the Air Handler
The sleek indoor head unit can collect dust and condensation around the vents. Once a week, gently wipe the surface with a dry microfiber cloth. Avoid harsh cleaners that can damage the finish or introduce chemicals into your indoor air. A quick wipe keeps the unit looking nice and helps reduce buildup.
Control Indoor Humidity
Mold just loves moisture. If your home tends to be humid, your mini-split will have to work harder to keep things dry. Consider using a standalone dehumidifier or setting your system to “dry mode” when the air feels heavy. Keeping humidity levels between 30% and 50% makes your home more comfortable and less appealing to mold.
Clear the Drain Line
Every ductless AC unit has a condensate drain line that removes moisture collected during cooling. If this line clogs, water can back up into the unit and create a breeding ground for mold. Check the line for blockages when cleaning air filters, and if you notice leaks or drips, call a professional.
Schedule Professional Maintenance
Your ductless system needs professional maintenance twice a year, even with regular cleaning. A trained HVAC technician can clean the coils. They check refrigerant levels and make sure everything runs as expected. Professional maintenance not only prevents mold but also extends the life of your mini-split system.
Use Your System Every Day
Running your unit can help prevent mold, which may surprise you. Ductless AC units can gather stagnant air and moisture when not used for a long time. This creates a perfect spot for mold to grow. Even if the weather is mild, consider running the fan setting for an hour or two to keep the air circulating.
It is never a bad time to get your ductless AC cleaned by a professional. When you need ductless mini-split services, contact Absolute Plumbing, Electrical, Heating & Air in Denver, CO.