How to Clean a Mini Split Blower Wheel: A Comprehensive Guide

Maintaining the cleanliness of your mini split’s blower wheel is crucial for optimal performance and energy efficiency. This comprehensive guide will walk you through the step-by-step process of cleaning a mini split blower wheel, providing you with expert-level technical details and a hands-on approach to ensure a thorough and effective cleaning.

Preparing for the Cleaning Process

Before you begin, ensure that you have the necessary tools and equipment on hand. This includes:

  1. A set of screwdrivers (both flathead and Phillips head)
  2. A garden hose or a high-pressure air compressor
  3. A soft-bristled brush or a coil cleaning brush
  4. A vacuum cleaner with a crevice tool attachment
  5. Refrigeration Technologies Viper cleaning products or a similar coil cleaner
  6. Protective gloves and eyewear

Removing the Blower Wheel

how to clean a mini split blower wheelImage source: Flickr

  1. Locate the access panel on your mini split unit, typically on the opposite side of the blower wheel’s set screw.
  2. Carefully remove the access panel by unscrewing the screws that hold it in place.
  3. Identify the coil, which is connected to the unit by a few screws.
  4. Loosen the screws that secure the coil, taking care not to damage any wiring or connections.
  5. Gently move the coil aside to expose the blower wheel.
  6. Locate the set screw that secures the blower wheel to the motor shaft.
  7. Using the appropriate screwdriver, loosen the set screw and carefully remove the blower wheel from the shaft.

Cleaning the Blower Wheel

  1. Take the blower wheel to a well-ventilated area, preferably outdoors, where the debris won’t be an eyesore.
  2. Using the garden hose or the air compressor, thoroughly rinse the blower wheel to remove any accumulated dust, dirt, or debris.
  3. If necessary, use the soft-bristled brush or the coil cleaning brush to gently scrub the blower wheel, paying special attention to the fins and any hard-to-reach areas.
  4. Apply the Refrigeration Technologies Viper cleaning product or a similar coil cleaner to the blower wheel, following the manufacturer’s instructions.
  5. Allow the blower wheel to completely dry before proceeding to the next step.

Cleaning the Evaporator Coil

  1. If your mini split unit has a coil bib, use it to cover the evaporator coil and protect it during the cleaning process.
  2. If you don’t have a coil bib, use a combination of a rag, a spray cleaner, and a shop vac with a soft-bristle brush attachment to clean the evaporator coil.
  3. Carefully remove any debris or dust buildup, taking care not to damage the delicate fins.
  4. Rinse the evaporator coil with the garden hose or the air compressor to remove any remaining cleaning solution.

Reassembling the Unit

  1. Carefully reinsert the blower wheel onto the motor shaft, ensuring that it is properly aligned and secured with the set screw.
  2. Gently move the coil back into its original position and secure it with the screws.
  3. Replace the access panel, taking care not to damage the fins or any other components.
  4. Restore power to the mini split unit and test its operation to ensure proper functioning.

Remember, the fins on the blower wheel are fragile and can be easily damaged. Use non-metal tools and avoid sharp edges when handling the blower wheel to prevent any scratches or cracks.

By following this comprehensive guide, you can effectively clean your mini split blower wheel and maintain the optimal performance of your HVAC system. Regular maintenance and cleaning can extend the lifespan of your mini split unit and ensure a comfortable indoor environment.


  1. How to Clean a Mitsubishi Mini-Split Blower Wheel – HVAC School
  2. Advice for removing mini split blower wheel – Reddit
  3. Highwall Ductless Blower Wheel Cleaning – YouTube