Cleaning the indoor evaporator coil with compressed air will blow dust and debris inside the home. Using compressed air can be a quick and reasonably effective method to remove surface dust, dirt and debris from the coil. … These actions will remove mostly loose, surface materials from the coil.

How do you brush AC coils?

AC Coil Cleaning Brush: Start scrubbing the coils with the brush and push away any dirt that has accumulated. Brush harder in some areas that have a lot of buildup. Be mindful to avoid wire brushes or brushes with hard bristles. You don’t want to ruin the fins on your AC unit.

What happens if you don't clean your AC coils?

The short answer. Dirt & grime on AC coils makes it harder for your equipment to transfer heat. That means it has to run longer and work harder to do it’s job, using more energy and causing parts to wear and break down. Dirty coils also get corroded which leads to refrigerant leaks.