Off-cycle defrost is a passive method of removing frost from an evaporator coil by keeping the fan running while the compressor is turned off. This allows the warmer room air to melt the ice naturally without using any extra energy or reversing the refrigeration cycle. This is a common feature in Commercial HVAC refrigeration and some residential Air Handlers operating in high-humidity areas. By preventing ice buildup on the AC Coil Systems, off-cycle defrost ensures that airflow remains consistent throughout the day. If your unit is freezing up, a technician can often program an off-cycle defrost into your Control Board. It is a simple, cost-effective way to manage light frost without the complexity of a full Defrost Cycle. Our ACIq systems use intelligent logic to determine when this passive defrost is most effective. It helps maintain a healthy, dry evaporator coil for long-term cooling performance.