How to Clean the Air Filter of Your MRCOOL Split AC Unit: A Comprehensive Guide

Maintaining the air filter of your MRCOOL split AC unit is crucial for ensuring optimal performance, energy efficiency, and indoor air quality. This comprehensive guide will walk you through the step-by-step process of cleaning your MRCOOL split AC air filter, providing you with expert-level insights and technical details to ensure a thorough and effective cleaning.

Preparing for the Air Filter Cleaning

  1. Power Down the Unit: Before beginning the cleaning process, ensure that the MRCOOL split AC unit is turned off and unplugged from the power source to prevent any accidents or electrical hazards.
  2. Locate the Air Filter: The air filter is typically located at the indoor unit, near the grille. Consult your MRCOOL unit’s user manual or the manufacturer’s website to identify the exact location of the air filter.
  3. Gather the Necessary Tools: Assemble the following tools and materials to ensure a successful air filter cleaning:
  4. Vacuum cleaner with a soft-bristle brush attachment
  5. Mild detergent or filter cleaning solution
  6. Clean, soft-bristle brush
  7. Microfiber cloth
  8. Rubber gloves (optional)

Removing the Air Filter

how to clean air filter of MRCOOL split ac

  1. Identify the Filter Tabs: Locate the tabs or handles on the sides of the air filter. These tabs are designed to allow for easy removal and reinstallation of the filter.
  2. Gently Pull Out the Filter: Carefully grasp the tabs or handles and pull the air filter out of the unit, ensuring that you do not damage or bend the filter.
  3. Inspect the Filter: Closely examine the air filter for any visible signs of damage, such as tears, holes, or excessive dirt buildup. If the filter is severely damaged, it may need to be replaced.

Cleaning the Air Filter

  1. Vacuum the Filter: Using the soft-bristle brush attachment on your vacuum cleaner, gently brush and vacuum both sides of the air filter to remove any loose dust and debris.
  2. Rinse the Filter (Optional): If the air filter is heavily soiled, you can rinse it under running water. Avoid using hot water, as it may damage the filter material. Gently agitate the filter to dislodge any stubborn dirt or debris.
  3. Use a Cleaning Solution (Optional): For a more thorough cleaning, you can use a mild detergent or a specialized air filter cleaning solution. Dilute the cleaning solution according to the manufacturer’s instructions, and submerge the filter in the solution for the recommended time.
  4. Rinse and Dry the Filter: After cleaning, rinse the air filter thoroughly under running water to remove any remaining cleaning solution. Gently shake off any excess water and allow the filter to air dry completely before reinstalling it.

Reinstalling the Air Filter

  1. Inspect the Filter Slot: Ensure that the filter slot in the MRCOOL split AC unit is clean and free of any debris or obstructions.
  2. Align the Filter: Carefully align the air filter with the filter slot, ensuring that the tabs or handles are properly positioned for easy removal and reinstallation.
  3. Secure the Filter: Gently push the air filter into the slot until it clicks into place, ensuring a secure and proper fit.
  4. Close the Unit: Carefully close the front cover of the MRCOOL split AC unit, making sure that it is securely in place.

Maintaining the Air Filter

  1. Regular Cleaning: It is recommended to clean the air filter of your MRCOOL split AC unit every 1-3 months, depending on the usage and environmental conditions.
  2. Replacement: If the air filter is severely damaged or cannot be effectively cleaned, it should be replaced with a genuine MRCOOL replacement filter to ensure optimal performance and indoor air quality.
  3. Comprehensive Cleaning: For a more thorough cleaning of your MRCOOL split AC system, consider using the MRCOOL Care Kit, which includes specialized cleaners for the coils, air handler, and other components.

By following this comprehensive guide, you can ensure that your MRCOOL split AC unit’s air filter is clean, efficient, and contributing to the overall performance and longevity of your system.


  1. MRCOOL. (n.d.). How to Clean Your Air Conditioner Filter – MRCOOL. Retrieved April 26, 2024, from
  2. MRCOOL. (2023, November 6). 4th Gen MRCOOL DIY Air Filter Cleaning [WORKS FOR ALL MINI … [Video]. YouTube.
  3. Ingram’s Water & Air Equipment. (n.d.). MrCool Care Kit – How To Clean Your Ductless Mini Split. Retrieved April 26, 2024, from