Inadequate defrosting can lead to reduced airflow, decreased heat transfer, and increased energy consumption. As frost accumulates on the outdoor coil, the system must work harder to maintain the desired temperature, resulting in higher energy bills and potential component failure. Additionally, inadequate defrosting can cause compressor damage, refrigerant leaks, and reduced system lifespan. It is essential to ensure proper defrost system operation to maintain optimal system performance and prevent these negative consequences.