The self-cleaning function is a smart feature on many of our Wall Mount units that helps keep the indoor coil fresh. When activated, the system freezes the Evaporator Coil to capture dust, then melts it away into the Drain Pan. This process removes dirt and bacteria that can cause odors and reduce airflow. It is a standard feature on our Sophia and Olivia series. Running this function once a month can significantly reduce your need for professional Coil Cleaning. You can start the process with a single button on your Remote Control. It’s an easy way for homeowners to manage their own Preventive Maintenance. Clean coils are the secret to a long-lasting and efficient Heat Pump System.