How to Clean a Mini Split Fan: A Comprehensive Guide

Maintaining the cleanliness of your mini split system is crucial for its efficient and long-lasting operation. One of the essential components to keep clean is the fan, as it plays a vital role in circulating air throughout your living space. This comprehensive guide will walk you through the step-by-step process of cleaning a mini split fan, ensuring your system operates at its best.

Gather the Necessary Tools and Materials

Before you begin the cleaning process, make sure you have the following tools and materials on hand:

  1. Air nozzle
  2. Pancake compressor
  3. Soft-bristled brush
  4. Vacuum cleaner
  5. Microfiber cloth
  6. Coil cleaner (optional)
  7. Protective gloves and eyewear

Prepare the Mini Split System

how to clean mini split fanImage source: Flickr

  1. Turn off the Unit: Ensure the mini split system is turned off to prevent any accidents or injuries during the cleaning process.
  2. Locate the Indoor Unit: Identify the indoor unit of the mini split system, as this is where the fan is located.
  3. Access the Fan: Carefully remove the cover or panel of the indoor unit to gain access to the fan. This may require unscrewing or unclipping the cover, depending on the model.

Clean the Fan Blades

  1. Inspect the Fan Blades: Visually inspect the fan blades for any visible dirt, dust, or debris accumulation.
  2. Use a Soft-Bristled Brush: Gently brush the fan blades with a soft-bristled brush to remove any loose particles. Be cautious not to apply too much pressure, as this could potentially damage the blades or the motor.
  3. Blow Out the Debris: Connect the air nozzle to the pancake compressor and set the pressure regulator to approximately 75 psi. Hold the fan stationary and blow air over the blades to dislodge any remaining debris. Ensure the fan is not spinning too fast, as this could cause damage.
  4. Wipe Down the Blades: Use a microfiber cloth to gently wipe down the fan blades, removing any remaining dust or dirt.

Clean the Coils

  1. Inspect the Coils: Examine the coils on the indoor unit for any dirt, dust, or debris buildup.
  2. Use a Soft-Bristled Brush: Carefully brush the coils with a soft-bristled brush to loosen and remove any accumulated particles.
  3. Vacuum the Coils: Utilize the vacuum cleaner with a crevice tool attachment to suction up the dislodged debris from the coils.
  4. Consider Coil Cleaner: For stubborn dirt or grime, you can use a coil cleaner solution and a soft-bristled brush to scrub the coils. Ensure to follow the manufacturer’s instructions for proper application and rinsing.

Reassemble the Indoor Unit

  1. Inspect the Unit: Visually inspect the indoor unit to ensure all components are properly cleaned and in their correct positions.
  2. Reinstall the Cover: Carefully replace the cover or panel of the indoor unit, securing it in place with the appropriate screws or clips.
  3. Turn on the System: Power on the mini split system and verify that the fan is operating correctly and the airflow is unobstructed.

Maintain Cleanliness Regularly

To keep your mini split system running at its best, it’s recommended to clean the fan and coils regularly, typically every 6 to 12 months, or as needed based on usage and environmental conditions. Regularly cleaning the filters and hosing down the outdoor unit can also contribute to the overall cleanliness and efficiency of the system.

By following this comprehensive guide, you can effectively clean your mini split fan and ensure your system continues to provide reliable and efficient cooling or heating for your living space. Remember to always prioritize safety and follow the manufacturer’s instructions for your specific mini split model.


  1. How to Clean a Mini Split Blower Fan – YouTube
  2. Cleaning Ductless Mini Split Squirrel Cage Fans – HVAC-Talk
  3. Keeping a Mini Split Clean and Sanitary – Heating Help: The Wall