How to Clean the Air Filter of a Bosch Split AC: A Comprehensive Guide


Maintaining the air filter of your Bosch split air conditioner is crucial for optimal performance and energy efficiency. This comprehensive guide will walk you through the step-by-step process of cleaning the air filter, ensuring your AC unit runs smoothly and efficiently. From locating the filter to thoroughly cleaning the heat exchanger and fan unit, this article provides expert-level technical details and a hands-on approach to help you tackle this essential maintenance task.

Turning Off the Unit

how to clean air filter of bosch  split ac

Before beginning the cleaning process, it is essential to ensure the Bosch split AC unit is turned off. This step is crucial to prevent any accidents or potential damage to the unit. Disconnect the power supply to the AC and wait for the unit to completely power down before proceeding.

Locating the Air Filter

The air filter in a Bosch split AC unit is typically located behind the front panel of the wall-mounted indoor unit. To access the filter, gently lift the front panel until you hear a click, indicating it has been released from its secured position. Carefully remove the panel, taking care not to damage any of the components.

Removing the Air Filter

Once the front panel is open, you will be able to see the air filter. The filter may be held in place by clips, tabs, or a sliding mechanism. Gently slide or pull the filter out of the unit, ensuring you do not damage or bend the delicate filter material.

Cleaning the Air Filter

Vacuum Cleaning

Use a vacuum cleaner with a soft-bristle brush attachment to remove any loose dust and debris from the air filter. Gently brush the filter in a vertical motion, following the direction of the filter’s pleats or ridges. This method is effective for removing surface-level dirt and dust.

Water Rinsing

For more stubborn dirt and grime, you can rinse the air filter under lukewarm water. Submerge the filter in water and gently agitate it to dislodge any built-up particles. Avoid using hot water, as this can damage the filter material. Once the filter is clean, allow it to dry completely before reinstalling it.

Cleaning the Heat Exchanger

The heat exchanger is a critical component of the Bosch split AC unit, responsible for transferring heat between the refrigerant and the air. To clean the heat exchanger, use a vacuum cleaner with a large brush attachment. Gently brush the heat exchanger fins in a vertical direction, following the orientation of the fins. This will help remove any dust or debris that has accumulated on the surface.

For harder-to-reach areas, use a smaller brush attachment on the vacuum cleaner to ensure thorough cleaning. Be cautious when cleaning the heat exchanger, as the fins are delicate and can be easily bent or damaged.

Cleaning the Fan Unit

The fan unit in a Bosch split AC is responsible for circulating the air throughout the room. To clean the fan, first, remove the fan blades. This can typically be done by gently pulling or unscrewing the fan blades from the motor shaft.

Once the fan blades are removed, use a soft, dry cloth to wipe away any dust or debris that has accumulated on the blades. Avoid using water or any cleaning solutions, as this can damage the fan motor and bearings.

After cleaning the fan blades, reinstall them, ensuring they are securely clicked or screwed back into place. Rotate the fan blades by hand to ensure they are properly balanced and do not rub against any surrounding components.

Reinstalling the Air Filter and Front Panel

With all the components cleaned, it’s time to reassemble the Bosch split AC unit. Carefully slide the air filter back into its designated slot, making sure it is properly aligned and securely in place. Then, replace the front panel, ensuring it clicks back into its secured position.


Maintaining the air filter of your Bosch split AC unit is a crucial task that can significantly impact the performance and energy efficiency of your cooling system. By following the detailed, expert-level instructions provided in this guide, you can effectively clean the air filter, heat exchanger, and fan unit, ensuring your Bosch split AC continues to operate at its best.

Remember to refer to the manufacturer’s instructions and safety guidelines when performing any maintenance on your Bosch split AC unit. If you are unsure or uncomfortable with any of the steps, it is always recommended to consult a professional HVAC technician.


  1. How to clean air conditioner filters – YouTube
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  3. Air Con Filter Maintenance / Wall Split / How to DIY – YouTube