Efficient Ductless Mini Split Cleaning: A Comprehensive Guide

Cleaning Your Ductless Air Conditioning System: A Comprehensive Guide

Failing to properly maintain your ductless air conditioning system can lead to a variety of issues, including reduced efficiency, sub-par performance, and even expensive repair bills. In this article, we will walk you through the process of cleaning a ductless head, including the filters, evaporator coil, and blower wheel. With the guidance of an experienced ductless AC technician, you can learn how to keep your system running efficiently and effectively.

Why Regular Ductless AC Maintenance is Essential

Ductless air conditioning systems typically consist of an outdoor unit and one or more indoor units, which are connected to the outdoor unit by a series of refrigerant and electrical lines. These indoor units feature an evaporator coil, which can become dirty over time due to the buildup of dust and other airborne contaminants. When this happens, the efficiency and performance of the system can be significantly compromised.

Not only can a dirty evaporator coil lead to reduced cooling and heating output, but it can also place increased stress on the system’s blower motor. This can result in decreased longevity and potential damage to other system components. Therefore, it’s essential to clean your ductless AC filters regularly to maintain proper airflow, prevent the buildup of dust and debris, and ensure optimal system performance.

The Importance of Cleaning AC Filters

In order to maintain good indoor air quality and prevent the negative effects of a dirty evaporator coil, it’s crucial to clean your ductless AC filters regularly. By doing so, you can ensure that the system operates efficiently, and you can also extend the life of your AC equipment.

In most cases, it’s recommended that you remove and clean your ductless system’s filters at least every other month. You can either vacuum the filters to remove dust and debris, or you can rinse them in your sink and allow them to air dry before reinstallation. By keeping your filters clean, you can reduce the likelihood of dirt and debris accumulating on the evaporator coil and causing damage to your AC system.

How to Clean Your Ductless AC Filters

Cleaning your ductless AC filters is a relatively simple process that can be completed quickly and easily. To clean the filters:

1. Open the front cover of your indoor unit by sliding it down.
2. Remove the air filters by gently pulling them out of the unit.
3. Either:
a. Vacuum the filters using the brush attachment on your vacuum cleaner, or
b. Rinse the filters in your sink using a mild detergent and warm water. Allow the filters to air dry completely before reinstalling them.
4. Once the filters are clean and dry, slide them back into the indoor unit.
5. Close the front cover of the indoor unit by sliding it back up into place.

By cleaning your filters regularly, you can ensure that your ductless AC system operates at peak efficiency and maintains healthy indoor air quality.

Cleaning the Evaporator Coil and Blower Wheel

In addition to cleaning the filters, it’s also essential to clean the evaporator coil and blower wheel of your ductless AC system. Over time, dust and debris can accumulate on these components, reducing airflow and overall system performance.

To clean the evaporator coil and blower wheel, you’ll need a specialized cleaning solution that is safe for use on air conditioning coils, as well as a low-pressure washer or sprayer. The cleaning process involves applying the cleaning solution, allowing it to foam and lift the dirt from the coil and blower wheel fins, and then rinsing away the debris with the low-pressure washer.

Protect any sensitive electronics with tape or a cover, and utilize a mini-split bib kit to catch and direct any excess water into a bucket below the unit. By cleaning the evaporator coil and blower wheel, you can ensure optimal airflow and peak system performance.


Regular maintenance is critical to keeping your ductless air conditioning system running efficiently and effectively. By cleaning your filters, evaporator coil, and blower wheel on a consistent basis, you can prevent the buildup of dust and debris that can lead to reduced performance and potential damage to the system. With a little time and effort, you can extend the life of your ductless AC system and enjoy cool, comfortable indoor temperatures all year round.

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