Cleaning the air conditioner (AC) filter without removing it can be challenging, as the filter is designed to be removable for cleaning and replacement. However, there are a few methods you can try to clean the filter as best as possible without taking it out:
Vacuuming: Use a vacuum cleaner with a brush attachment to gently remove dust and debris from the surface of the filter. Be careful not to damage the filter while vacuuming.
Compressed Air: If you have access to compressed air, you can use it to blow off dust and dirt from the filter. Hold the compressed air nozzle at a safe distance to avoid damaging the filter material.
Soft Brush: If you can't remove the filter, use a soft-bristled brush, like a paintbrush or a clean makeup brush, to gently brush away loose debris from the filter's surface.
Air Purifier: If you have an air purifier with a HEPA filter, you can try placing it near the AC intake or output to help capture airborne particles and allergens.
Please note that these methods might not be as effective as a thorough cleaning by removing the filter and washing or replacing it. Cleaning without removing the filter may not fully eliminate trapped particles, and it may not improve the AC's efficiency or air quality significantly.
Ideally, it is recommended to follow the manufacturer's instructions and remove the filter for regular cleaning. Most AC filters can be easily taken out, washed with water (if they are reusable), and then dried before reinstalling them. Regular maintenance and cleaning of the filter will ensure better performance and longer life for your air conditioner. If you are unsure about how to remove or clean your AC filter, refer to the user manual or contact the manufacturer for guidance.